In Baldur's Gate 3 (BG3), the Underdark is a large underground area with a lot of entrances from certain locations in the Wilderness. Read on to view the maps of the Underdark, and to find out all locations and points of interest in these areas.

Underdark Maps

Underdark Maps
Underdark Full Map North Underdark: Ebonlake Grotto and Storehouse West Underdark: Dread Hollow and Decrepit Village East Underdark: Selunite Outpost South Underdark: Arcane Tower Ebonlake The Festering Cove

Underdark Full Map

This map contains the major Underdark area, accessible from a few entrances from the aboveground. This shows all the locations and the entrances only; to view a closer look to the sub-areas of this map showing more points of interest, check the other maps below.
How to Get to the Underdark

North Underdark Map: Ebonlake Grotto and Storehouse

This map contains the Ebonlake Grotto where the Myconid Colony resides, located at the north part of the map. East of it is the Storehouse, which has an entrance to the Underdark at the Zhentarim Hideout in the aboveground.

West Underdark Map: Dread Hollow and Decrepit Village Map

This map contains the Dread Hollow and the Decrepit Village.

The Dread Hollow is the location of the Sussur Tree, located at the westmost point of the Underdark area. To the east of this is the Decrepit Village, which surrounds the Underdark - Beach waypoint, and contains the boat that can take you to the Grymforge.

East Underdark Map: Selunite Outpost

This map contains most of the outskirts of the Underdark surrounding the Selunite Outpost area in the southeast.

South Underdark: Arcane Tower

This map contains most of the south part of the Underdark, containing the Arcane Tower.

Ebonlake

This map contains the two boats sailing through the Ebonlake. You can only explore this map once: when you use the boat in the Decrepit Village, and only if you decide to attack the other boat.

The Festering Cove

This map contains The Festering Cove, the tiny underground area underneath the main Underdark area.

Underdark Locations

Underdark Maps
Ebonlake Grotto (Myconid Colony) Storehouse Dread Hollow (Sussur Tree) Decrepit Village (Beach) Selunite Outpost Arcane Tower Ebonlake

Ebonlake Grotto (Myconid Colony)

The Ebonlake Grotto is where the Myconid Colony reside. Most of the residents here are Myconid people with minds connected to the current Sovereign. There are also a few non-Myconid people here.

Storehouse

The Storehouse contains the area where you'll arrive after accessing the Underdark entrance in the Zhentarim Hideout. There are a lot of lootable chests, crates, and other containers in the area.

Dread Hollow (Sussur Tree)

The Dread Hollow contains the Sussur Tree, where you'll find a bunch of Sussur Bloom, and the Sussur Tree Bark. There are a lot of Hooked Horror enemies roaming the area.

How to Get a Sussur Tree Bark

Decrepit Village (Beach)

The Decrepit Village, located by the Beach waypoint, is an area with a bunch of Duergar bandits led by Gekh Coal.

Selunite Outpost

The Selunite Outpost is a ruined structure with an active defense mechanism that will attack any intruders that approach from the front entrance. There is an entrance to the Underdark in this area, accessible in the Defiled Temple in the aboveground.

Safely Enter the Outpost by Destroying the Moonstone

To get inside the structure if you didn't enter through the Defiled Temple, there are a couple ways to do so. You can get inside the Rocky Crevice to the east that can be revealed with a perception check, but you'll need a tiny character like a Gnome to get inside, or be in a Gaseous Form. You can also get through the west window by jumping to the ledge west of the bridge, but you might take some hits this way.

Once inside, simply hit the Moonstone with a ranged attack. Then, hit the lever beside the gate so you can open the front entrance for your other party members.

Arcane Tower

The Arcane Tower is a tower at the south part of the map, full of powerful Arcane Turrets that will attack you when you approach them. There are a couple of entrances to the tower accessible by going around to the back of the tower.

The Arcane Turrets themselves are weak to electric-based attacks, but you can disable them by disabling their power source located in the lowest floor of the tower.
How to Enter the Arcane Tower

Ebonlake

The Ebonlake is the body of water that connects the main Underdark area to the Grymforge. You'll only be here briefly when you encounter the Duergar boat that will question you.

You can only explore the boats by attacking the Duergar; if you leave this area, you won't be able to explore the boats anymore.

The Festering Cove

The Festering Cove is a tiny swampy area underneath the Underdark, where a small group of Kuo-toa who worship BOOOAL reside. There's a bunch of chests and lots of fish around the area.

Underdark Points of Interest

Underdark Points of Interest

Ebonlake Grotto Points of Interest 　・Myconid Colony Waypoint 　・People of Interest 　・Guardian Gate 　・Pale Corpse: The Great Furnace of Grymforge 　・Shadow of Menzaberranzan Dread Hollow Points of Interest 　・Sussur Tree Waypoint 　・Sussur Tree Bark 　・Filro the Forgotten 　・Bulette 　・Tombstone: Dog Collar Decrepit Village Points of Interest 　・Beach Waypoint 　・Gekh Coal 　・Underdark Druegar Boat Selunite Outpost Points of Interest 　・Selunite Outpost Waypoint 　・Portcullis 　・Moonstone 　・Rocky Crevice Entrance 　・Gilded Chest: Helmet of Smiting Arcane Tower Points of Interest 　・Ornate Door 　・Locked Door 　・Hole The Festering Cove Points of Interest 　・BOOOAL 　・Pooldrip the Zealous Underdark Outskirts Points of Interest 　・Spectator and Dhourn 　・Cragged Rock: Festering Cove 　・Heavy Chest: Drow Studded Leather Armour 　・On Educating the Faithful 　・Phalar Aluve 　・Baelen Bonecloak

Ebonlake Grotto Points of Interest

Myconid Colony Waypoint

Myconid Colony Waypoint
Coordinates: (102, -102)

The Myconid Colony Waypoint sits at the heart of the Ebonlake Grotto area.

People of Interest

Sovereign Spaw

Sovereign Spaw
Coordinates: (77, -105)

Sovereign Spaw is the initial monarch of the Myconid Colony. It will be talking through the other Myconids, and you'll have to find it at the elevated mushroom at the middle of the area. It'll have a few quests to assign to you.

Sovereign Glut

Sovereign Glut
Coordinates: (59, -108)

Sovereign Glut is a Myconid not controlled by Spaw. After first talking to Spaw, go southwest to talk to Glut, who'll offer to be your companion in fighting the druegars.

We recommend not to immediately complete its quest of overthrowing Spaw; avoid talking to it after defeating the druegar. Glut is an extremely useful companion in the Underdark, as it has the ability to resurrect any enemies (even powerful bosses!) as long as you stay in the Underdark, giving you two extra companions for battle.

Thulla

Thulla
Coordinates: (83, -98)

Thulla is a poisoned gnome located nearby Sovereign Spaw. She is behing hunted by the druegar in the Underdark for stealing the Boots of Speed
from their sergeant.

To get the item, you can cure her with an antidote (the Druegar at the beach will have one) and she'll willingly give you the boots. You can also just let her die from the poison or kill her.

Blurg

Blurg the Trader
Coordinates: (112, -89)

Blurg is a hobgoblin who's a member of The Society of Brilliance, and is a friend of the mindflayer Omeluum. He's also a trader who'll have a lot of items to sell, some of them unique to him.

Omeluum

Omeluum
Coordinates: (112, -88)

Omeluum is a mindflayer who's also a member of The Society of Brilliance. He'll appear while you're first talking to Blurg, and is interested in removing the tadpole in your head, adding to the Find a Cure main quest.

Derryth Bonecloak

Derryth Bonecloak
Coordinates: (49, 094)

Derryth is a trader situated in the Ebonlake Grotto, and is looking for her missing husband, Baelen Bonecloak. She'll give you the Gloves of Unhibited Kushigo as a reward for finding him.
How to Get Gloves of Uninhibited Kushigo

Guardian Gate

Guardian Gate
Coordinates: (54, -87)

The Guardian Gate is a bunch of vines that block off an area near Derryth. You can't destroy these vines; the only way to pass through this gate is to complete the first quest assigned to you by Spaw, Protect the Myconid Circle.

Note that if you chose to kill Spaw by helping Glut, you won't be able to open this gate and access its contents forever. To avoid this, don't progress Glut's quest by talking to him; directly talk to Spaw after defeating the druegar.

Pale Corpse: The Great Furnace of Grymforge

Pale Corpse: The Great Furnace of Grymforge
Coordinates: (52, -72)

Accessible in the room behind the Guardian Gate, the Pale Corpse contains a few valuables in his possession: most important of which is The Great Furnace of Grymforge. Note that it will first appear in his inventory as the Flumph Mating Rituals, and you'll have to pass the check while reading it to reveal the book's true form.

Reading this book allows you to know how to operate the Adamantine Forge once you find it.

Shadow of Menzaberranzan

Shadow of Menzaberranzan
Coordinates: (54, -73)

Also behind the Guardian Gate, near the Pale Corpse, is the Shadow of Menzaberranzan: a Rare Headgear that gives the useful Shrouded in Shadow ability, which makes the user invisible.

How to Get Shadow of Menzoberranzan

Dread Hollow Points of Interest

Underdark - Sussur Tree Waypoint

Sussur Tree Waypoint
Coordinates: (-49, -138)

The Sussur Tree Waypoint is located at the northeast part of Dread Hollow, near some Hooked Horrors.

Sussur Tree Bark

Sussur Tree Bark
Coordinates: (-14, -142)

The Sussur Tree Bark is a material necessary for the Finish the Masterwork Weapon quest, allowing you to forge a Masterwork weapon in the blacksmith forge in Blighted Village.

How to Finish the Masterwork Weapon

Filro the Forgotten

Filro the Forgotten
Coordinates: (-58,-159)

Filro the Forgotten is a boss enemy located in the Dread Hollow, who'll immediately fight you with the Hook Horrors in his vicinity when you approach him.

He is one of the three Drow looking for the Adamantine Forge; after you kill him, you can use a Speak with Dead spell to learn more about the forge.

Bulette

Bulette
Coordinates: (-45, -204)

Bulette is a boss monster at the south part of Dread Hollow, who you'll encounter burrowing around, knocking your party members off-balance. Try not to have your party members grouped up and be ready for the ambush attack when you proceed to its territory.

Tombstone: Dog Collar

Tombstone: Dog Collar
Coordinates: (-41, -211)

At the southeast part of the Dread Hollow, you'll find a Tombstone. Interact with it and dig the grave up to get the Dog Collar amulet. There are no negative effects to doing this act.

While this item has no effect in battle or for exploration, it will have an effect when worn while pressing a button near the dog bed in the Arcane Tower.

Decrepit Village Points of Interest

Underdark - Beach Waypoint

Underdark - Beach Waypoint
Coordinates: (23, -211)

The Beach Waypoint is located near the coast of Decrepit Village.

Gekh Coal

Gekh Coal
Coordinates: (10, -195)

Gekh Coal is the leader of the druegar in the beach. He'll give you the Find the Missing Boots quest as long as you don't attack him when you first encounter him. He'll be immediately hostile if you have Glut in your party.

You'll need to kill him as part of Spaw and Glut's questlines, and it's also useful to kill him for Thulla since he's carrying the antidote to her poison.

Underdark Druegar Boat

Underdark Druegar Boat
Coordinates: (-9, -213)

The Underdark Druegar Boat is the boat owned by Gekh Coal, and the mode of transportation that allows you to travel to the Grymforge. You can sail with this boat even if Gekh Coal is still alive, but if you come back to the beach, he'll be angry and will be immediately be hostile to you.

When you sail with this boat for the first time, a Druegar boat will question you, and depending on your choices, will either attack you or let you go safely.

How to Get to the Grymforge

Selunite Outpost Points of Interest

Underdark - Selunite Outpost Waypoint

Underdark - Selunite Outpost Waypoint
Coordinates: (176, -235)

The Selunite Outpost Waypoint is located inside the outpost, by the east part of the building.

Portcullis

Portcullis
Coordinates: (152, -218)

The Portcullis is the gate entrance of the outpost. It will initially be locked, and there are two statues that will attack you if you approach through the entrance (you'll initially find a Minotaur who would demonstrate these statues).

To open it, you need to trigger the Lever inside the outpost, just beside the Portcullis.

Moonstone

Moonstone
Coordinates: (155, -231)

The Moonstone is the object that you need to destroy to disable the attacking statues at the outpost's front entrance. It is located at the top of the statue inside the outpost, and can be destroyed with any ranged attack.

Rocky Crevice Entrance

Rocky Crevice Entrance
Coordinates: (165, -209)

One of the entry points in the outpost is the Rocky Crevice, located to the northeast of the gate. You'll need to spot it with a Perception Check, then enter through it with a tiny character such as a Gnome, or be in a Gaseous Form.

You can then destroy the Moonstone from the inside, then flip the lever to allow your other characters to enter.

Gilded Chest: Helmet of Smiting

Gilded Chest: Helmet of Smiting
Coordinates: (164, -244)

The Gilded Chest is located by the terrace in the outpost; there will be traps nearby as you approach the chest. Lockpick the chest to open it and get the rare Helmet of Smiting equipment.

How to Get Helmet of Smiting

Arcane Tower Points of Interest

Note that this section only lists the points of interest outside the Arcane Tower. For points of interest inside the tower, check back soon for more info.

Ornate Door

Ornate Door
Coordinates: (-20, -283)

The Ornate Door is the front entrance to the Arcane Tower. It is not recommended to enter through this entrance until you've disabled the Arcane Turrets, since you'll have to deal with these turrets outside and inside the tower.

Locked Door

Arcane Tower Locked Door
Coordinates: (-53, -294)

The Locked Door to the Arcane Tower is located behind the tower. To reach this, you'll have to jump across the mushrooms south of the tower. You'll have to lockpick this door to open it from the outside.

Hole

Hole Beside Arcane Tower
Coordinates: (-50, -302)

This Hole can be found with a perception check beside the Arcane Tower. To reach this, you'll have to jump across the mushrooms south of the tower.

This passageway is extremely small and can't be entered by small races; the only way to enter here is by having a character in a Gaseous Form enter. In the garden west of the tower, you'll find a Scroll of Gaseous Form that you can use to enter; you can then open the Locked Door from the inside for your other party members.

Festering Cove Points of Interest

BOOOAL

BOOOAL
Coordinates: (-428, 281)

BOOOAL is the deity of the Kuo-Toa. To talk to him, talk to Pooldripp the Zealous first. Depending on your choices, you can fight and kill him, join forces with him, or sacrifice one of your party members in his name.

If you kill him, he won't drop have much loot in his person. If you join forces with him, he'll give you the Sickle of BOOOAL. If you sacrifice one of your party members, they'll be permanently dead (you won't be able to revive them in any way), and the remaining party members will receive the BOOOAL's Benediction buff for the rest of the game, which gives an advantage against Bleeding targets.
How to Get Sickle of BOOOAL

Pooldripp the Zealous

Pooldripp the Zealous
Coordinates: (-428, 281)

Pooldripp is the acting leader of the Kuo-Toa, the fish people worshiping BOOOAL. When you talk to him, you'll be able to talk to BOOOAL.

You can kill or pickpocket him for the Sickle of BOOOAL weapon if BOOOAL didn't end up giving it to you.

Underdark Outskirts Points of Interest

This section counts all points of interest that do not fall under the above named locations; the map will simply display Underdark when you are near these.

Spectator and Dhourn

Spectator and Dhourn
Coordinates: (118, -251)

The Spectator can be found to the west of the Selunite Outpost. You won't be able to see it; you just need to walk through the area full of petrified people. It will do a surprise attack against you; there's no way to avoid this.

It will also revive Dhourn and his companions to fight for him, but you can disable this by attacking them once or defeating Spectator. If Dhourn lives, you'll be able to chat with him. Through passing checks or talking to his corpse with a Speak with Dead ability, you'll be able to find the location of the forge.

Cragged Rock: Festering Cove

Cragged Rock: Festering Cove
Coordinates: (76, -243)

To the southeast of the Decrepit Village and west of the Selunite Outpost, you'll find this Cragged Rock, which leads to another Underdark area, the Festering Cove.

Heavy Chest: Drow Studded Leather Armour

Heavy Chest: Drow Studded Leather Armour
Coordinates: (83, -206)

To the southeast of the Decrepit Village, you'll find this Heavy Chest containing the rare Drow-Studded Leather Armour equipment.

On Educating the Faithful

On Educating the Faithful
Coordinates: (85, -207)

To the southeast of the Decrepit Village, just near the Heavy Chest, you'll find the On Educating the Faithful book. It will be an Inspirational Event for Gale if you read this book.

Phalar Aluve

Phalar Aluve
Coordinates: (116, -188)

To the northeast of the Selunite Outpost, you'll find the Phalar Aluve weapon stuck to the ground. You'll need to pass the Religion or Strength check to pull it out.
How to Get Phalar Aluve Weapon

Baelen Bonecloak

Baelen Bonecloak
Coordinates: (-18, -73)

Baelen Bonecloak is the husband of Derryth Bonecloak, who is looking for him through the Find the Mushroom Picker quest. You'll find him in the field of explosive mushrooms in the northwest part of the map, north of the Sussur Tree.

To rescue him, you'll need to pass him a Scroll of Misty Step; he has one in his backpack nearby. You can get to it by using Misty Step yourself, using a Fly spell, or other ways as long as you avoid setting off the mushrooms.

How to Find the Mushroom Picker

Baldur's Gate 3 Related Guides

Faerûn All Maps and Locations

Faerûn All Locations

Prologue Locations
Nautiloid
Act 1 Locations
Wilderness	Chapel Ruins
Emerald Grove	Owlbear Nest
Blighted Village	Whispering Depths
Putrid Bog (Sunlit Wetlands)	Overgrown Tunnel
The Risen Road	Zhentarim Basement
Goblin Camp	Mountain Pass: Rosymorn Monastery
Creche Y'llek	Underdark
Arcane Tower	Grymforge
Act 2 Locations
Shadow-Cursed Lands	Reithwin Town