Sinkholes are common in Florida and many other areas. I live in an area of limestone and associated caves, one of which is called Dead Man’s Hole where bodies were dumped back in the Civil War. Future paleontologists will probably have fun figuring that one out. In any case, there are probably areas with active sinkholes that would make for interesting study.
https://www.dailytrib.com/2014/10/10/dead-mans-hole-dark-spot-burnet-county-history/