American Grotto


Speleological Preservation and Exploration

Dedicated to the service and protection of God’s Earth through conservation, knowledge ,and adventure.


Cave Terminology


  • North American Outdoor Preservation, Education, and Conservation Team.

Cave Room Sizes

  • Very Small room: a room just large enough for one person to be in.
  • Small room: a room about the size of a bedroom or dining room.
  • Medium room: a room about the size of a house.
  • Large room: a room anything larger then what is above.