Depth map of the abyss (first 30 levels)

  |  0 feet
  |  
  |--Gnome Guards base camp (25 feet)
  |--Peaceful gnomish gardens (50 feet)
  |--A weak goblinoid outpost (100 feet)
  |--A small ice maze (150 feet)
  |--A haunted lesser tomb (200 feet)
  |--A shallow acid lake (250 feet)
  |--A minor demonic storm cavern (300 feet)
  |--Fiery caves (350 feet)
  |--Invaded gnomish gardens (400 feet)
  |--Inter-linked ice mazes (450 feet)
  |--A haunted abyss tomb (500 feet)
  |--A standard goblinoid outpost (550 feet)
  |--Demonic storm caves (600 feet)
  |--Inter-linked ice mazes (650 feet)
  |--A large fire cave network (700 feet)
  |--A strengthened goblinoid outpost (750 feet)
  |--Large, dangerous storm caverns (800 feet)
  |--A haunted greater tomb (850 feet)
  |--Dangerous, large acid lakes (900 feet)
  |--A strengthened goblinoid outpost (950 feet)
  |--Large, dangerous storm caverns (1000 feet)
  |--The Cat Den (1050 feet)
  |--Haunted tombs of death (1100 feet)
  |--A dangerous ice kingdom (1150 feet)
  |--Vast and deadly acid lake networks (1200 feet)
  |--A goblinoid military settlement (1250 feet)
  |--A vast demon storm (1300 feet)
  |--Over-run gardens (1350 feet)
  |--A dangerous ice kingdom (1400 feet)
  |--Haunted tombs of death (1450 feet)
  |  1500 feet
  |  
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