At Crater Lake National Park, the deepest lake in the U.S. is slated to close to swimmers and boaters for two years.

GEOQUIZ: To which country would you travel to visit the Ngorongoro Crater? Answer: Tanzania. The extinct volcanic caldera in the northern part of the country is popular for its game viewing. The ...

These spectacular bursts of lava originate from two vents within the Halemaʻumaʻu crater: the north vent and the south vent ... floor of Halemaʻumaʻu within the southern part of Kilauea caldera, ...