# 161: Index I

Iceland
  Ice-formation-decorated chamber beyond the Crystal Maze, most readily accessible via 161e and Roast Beef, or via Bounce Rift at furthest point of Puerile Humour Series (1996)
Ignorance is Bliss
  2nd pitch of Ignore this Bit (1993)
Ignore This Bit
  Passage off from ledge part way down Automatic Doors (1993)
Indian Rope Trick
  7m climb up from below The Thirty in Drunk and Stupid (1989) to [C1989-161-09]
Indian Scoop
  In short horizontal passage just before Dreaming Pitch in Dreamtime (1989)
Infinite Improbability Drive
  Superb phreatic tube reached from Biscuit Factory via Vogon Constructor Ship, leading to Skeleton in the Cupboard (1994)
Interview Blues
  Deep Vertical Series (to -451m) from Trifurcation at end of Triassic Park (1996) named for initial explorer who had to return to UK for an interview after just one trip