Cliffs

thumb|The White Cliffs of Dover upright|thumb|The Trango Towers in Pakistan. Their vertical faces are the world's tallest cliffs. Trango Tower center; Trango Monk center left; Trango II far left; Great Trango right. upright|thumb|Europe's highest cliff, Troll Wall in Norway, a famous [[BASE jumping location for jumpers from around the world.]]

form of coast where the action of marine waves has formed steep cliffs that may or may not be precipitous

underground house used for dwelling

wave-swept or wave-deposited ridge running parallel to a shoreline

steep cliffs with nesting locations for bird colonies