After your underground excursion, head back on the trail to view the second natural wonder. Unlike the first cave, you can’t enter Bronson Cave, but you can view it from a platform. A collapsed ...

Sistema Sac Actun (Mexico) – Located in the Yucatán Peninsula, it's one of the world’s longest underground rivers, connected to ancient Mayan cenotes. Lost River (USA – Indiana) – This river vanishes ...

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 ...

Deep dissection of an uplifted limestone massif over a period of five million years has produced a series of classical karst landforms, including cones, towers, enclosed depressions (cockpits), ...