from the American Southwest
It was created by a now extinct volcano but is named after the moon.
"Lunar Crater National Natural Landmark is located 70 miles (110 km) east-northeast of Tonopah in Nye County, Nevada. A 400-acre (1.6 km2) depression that is thought to have been formed by a past volcanic explosion, and one of two maars in the volcanic field of the Pancake Range. It was designated a National Natural Landmark in 1973." - visit the National Landmark site