A cave or cavern is a natural underground space large enough for a human to enter. Caves form naturally by the weathering of rock and they often extend deep underground. The word "cave" can also refer to much smaller openings such as sea caves, rock shelters, and grottos.
Speleology is the science of exploration and study of all aspects of caves and the environment that surrounds the caves. Exploring a cave for recreation or science may be called caving, potholing, or, in Canada and the United States, spelunking (see caving).
Famous quotes containing the word cave:
“In such an armor he may rise and raid
The dark cave after midnight, unafraid....”
—Gwendolyn Brooks (b. 1917)
“I was thewed like an Auroch bull,
And tusked like the great Cave Bear;
And you, my sweet, from head to feet,
Were gowned in your glorious hair.”
—Langdon Smith (18581908)
“Nothing is uglier than the sinner, nothing so leprous or fetid; the scar of his crimes is still raw, and he stinks like the cave of Hell.”
—Aurelius Clemens Prudentius (c. 348405)