crater -- a large, bowl-shaped cavity in the ground or on the surface of a planet or the moon, typically one caused by an explosion or the impact of a meteorite or other celestial body.
Crater Lake, Oregon
photo by Zainub Razvi
Crater from the 1962 "Sedan" nuclear test, Operation Plowshare
photo courtesy National Nuclear Security Administration
Ngorongoro Crater, Tanzania
photo by William Warby
Tongariro Crossing- Red crater
photo by L Gim
The Door to Hell gas crater, Derweze, Turkmenistan
photo by Tormod Sandtorv
photo by Mario André Cordero Alfaro
The crater of the volcano Poás, Costa Rica
photo by Peter Andersen
The largest crater in this picture of the Moon is Daedalus. Its diameter is about 58 miles.
photo taken by Apollo 11