Hainoa Crater
Hainoa Crater is a high mountain crater at an elevation of 2.406m (7,893ft) above the sea level, located on the island of Hawaii, USA.
The road to the crater is gravel, rocky, tippy and bumpy at times. Avoid driving in this area if unpaved mountain roads aren't your strong point. 4x4 required. Stay away if you're scared of heights. The road is pretty narrow.