found this list on the official forums, im always curious what the next dungeon is for me, and I've heard people asking about it in vent and guild chat.
Solo Dungeons
Name: Tortage Underhalls
Levels: 10-20
Zone: City of Tortage
Name: Acheronian Ruins
Levels: 10-20
Zone: City of Tortage
Name: Bubshur House
Levels: 23-25
Zone: Khopshef's Province
Name: Abandoned Smuggler Tunnels
Levels: 23-29
Zone: Wild Lands of Zelata
Name: The Maze
Levels: 27-29
Zone: Wild Lands of Zelata
Name: Spider Caverns
Levels: 28-30
Zone: Conall's Valley
Name: Black Castle
Levels: 31-32
Zone: Khopshef's Province
Name: Border Range
Levels: 32-34
Zone: Wild Lands of Zelata
Name: Outflow Tunnels
Levels: 35-37
Zone: Old Tarantia
Name: Pyramid of the Ancients
Levels: 36-37
Zone: Khopshef's Province
Name: Treasury of the Ancients
Levels: 38-40
Zone: Khopshef's Province
Name: Ice Cave
Levels: 50-52
Zone: Eiglophian Mountains
Name: Cannibal Cave
Levels: 55-56
Zone: Eiglophian Mountains
Name: Ice Ruins
Levels: 70-80
Zone: Atzel's Approach
Name: Halls of Eternal Frost
Levels: 72-80
Zone: Atzel's Approach
6-Player Dungeons
Name: Sanctum of the Burning Souls
Levels: 37-39
Zone: Wild Lands of Zelata
Name: The Cistern
Levels: 50-53
Zone: Tarantia Noble District
Name: Main System
Levels: 52-60
Zone: Tarantia Noble District
Name: Catacombs
Levels: 55-60
Zone: Tarantia Noble District
Name: Toirdealbach's Tomb
Levels: 58-60
Zone: Fields of the Dead
Name: Scorpion Cave
Levels: 75-76
Zone: Kheshatta
Name: Caravan Raider Camp
Levels: 78-80
Zone: Kheshatta
Name: Atzel's Fortress
Levels: 80
Zone: Atzel's Approach
Name: Onyx Chambers
Levels: 80
Zone: Kheshatta
24-Player Raids
Name: Vistrix's Lair
Levels: 78-80
Zone: Atzel's Approach
Name: Yakhmar's Cave
Levels: 80
Zone: Eiglophian Mountains
Name: Kylikki's Crypt
Levels: 80
Zone: Fields of the Dead
Name: Black Ring Citadel
Levels: 80
Zone: Kheshatta
Name: Thoth-Amon's Stronghold
Levels: 80
Zone: Kheshatta
Special 6-Player Dungeons
These are group dungeons whose level is variable. It is based on the level of the first person in the group to zone in.
Name: Imirian Ravine
Levels: Variable
Zone: Poitain
Name: Oasis of Zaara
Levels: Variable
Zone: Purple Lotus Swamp
Name: Frost Swamp
Levels: Variable
Zone: Lacheish Plains