Nesbitt and I met up with a large group of cavers, researchers and representatives from Texas Parks and Wildlife in remote Edwards County, where the Devil’s Sinkhole State Natural Area is ...

west of San Antonio in the Texas Hill Country. Garner is the state’s most visited state park. Total visits to Devil’s Sinkhole State Natural Area, northwest of San Antonio and south of Junction.

From Florida’s deep “Mystery Sink” to Texas’ bat-filled Devil’s Sinkhole, these massive collapses reveal the raw power of nature. Some keep expanding, while others expose prehistoric ...