Ulupaʻu Crater

Ulupaʻu Crater (also known as Ulupaʻu Head) is a tuff cone in the U.S. state of Hawaii, located near Marine Corps Base Hawaii on the Mokapu Peninsula.

It formed as a result of the Honolulu Volcanic Series, which was a set of eruptions from the Koʻolau Range during its rejuvenation stage. The HVS also created other volcanoes such as Diamond Head. The eastern part of Ulupaʻu's rim was destroyed due to erosion. A cinder cone known as Puʻu Hawaiʻiloa is located nearby on the same peninsula.