Vaults and dungeons
10 vault entrances on the overworld, 2 dragon lairs, 4 Nightmare Crucible arenas and 12 spectral rooms. Vault interiors are instanced rooms outside the map; each entrance below opens the map where the door is.
Ashenfall's underground comes in four kinds. Dragon lairs are the dragons' own halls. Vault entrances dot the overworld and every one leads into an instanced vault, the sealed Dragonkin rooms (the Kara rooms) where the traps pay Agility XP and the Vault Core waits at the end. Dungeons and crucibles are the open caves, mines and the Nightmare Crucibles you can walk into from the map, and spectral rooms are the small chambers behind spectral chests. Every entrance below is placed from the game's own actor data, so the coordinates match the markers on the map, and each links to the creatures and loot found inside.
Dragon lairs
2Vault entrances
10each leads to an instanced vault (the Kara rooms)The vault rooms the game places behind these doors: Thishepen Kara, Chaktan Kara, Crasorak Kara, Vertentis Kara, Kletterbuja Kara, Takla Kara, Skeklac Kara, Kalistrakthen Kara, Skekven Kara, Vekchenven Kara. Each is a sealed set of chambers with tier 7 vault chests at the end.
Dungeons and crucibles
16Spectral rooms
12the rooms behind spectral chestsSpectral Room 11, Spectral Room 4, Spectral Room 5, Spectral Room 2, Spectral Room 6, Spectral Room 9, Spectral Room 8, Spectral Room 1, Spectral Room 3, Spectral Room 7, Spectral Room 12, Spectral Room 10: small instanced rooms the game stitches together for the spectral chest encounters, each holding one spectral chest.
By area
The regions pages list what spawns around each entrance: Fractured Plains, Bleakfields Valley, Dunes of Uzzer and the rest under Regions.