The Ngorongoro Crater, formed when a large volcano collapsed roughly 2 to 3 million years ago, spans about 260 square kilometers and is widely cited as the world's largest inactive, intact, unfilled volcanic caldera. Its enclosed floor supports one of Africa's densest concentrations of wildlife.
Record no. MRB-2026-005980
World's Largest Inactive, Intact Volcanic Caldera
Reference Record – Not Certified
This record is compiled from publicly available sources for reference. It has not been examined or certified by The Book of World Records.