Category
page 1Caving

caving
thumb|Caving in a muddy section of Black Chasm Cave in [[California|alt=A man caving in muddy passage with helictite formations on the walls and ceiling]]
thumb|220px|upright|Stephens Gap, a vertical cave in Alabama
sump
passage in a cave that is submerged under water
pitch
section of a climbing route requiring a single rope length