Alabaster Caverns State Park in Oklahoma has an impressive 'world's largest' structure and it is something you need to ...

Gypsum caves, while rare, are not unheard of, even in the United States. For example, South Dakota's dazzling Jewel Cave National Monument is rich in gypsum crystals. But Alabaster Caverns stands ...

This serial property is an unusually well-preserved and extensive epigenic gypsum karst terrain. It includes a very high density of caves: over 900 caves in a relatively small area, with over 100 km ...

Then there is Gypsum Cave, an important ceremonial site for Southern Paiute people that also contained some of the earliest evidence of human inhabitants and Ice Age “megafauna,” or large ...