Crater
A crater is a round dent on a planet. They are usually shaped like a circle or an oval. They are usually made by something like a meteor hitting the surface of a planet. Underground activity such as volcanoes or explosions can also cause them but it's not as likely.
Crater Media
50,000-year-old Meteor Crater east of Flagstaff, Arizona, U.S.
Pano Horgoo volcano crater in Mongolia
Explosion crater created by the Sedan shallow underground nuclear test explosion in Nevada
Lake Manicouagan in Quebec, Canada, an impact crater lake
Deep pit crater on Hualalai Hawaii
The lunar crater Webb, as seen from Lunar Orbiter 1. Several smaller craters can be seen in and around Webb.
