caving in utah
While much of Utah is famous for its sandstone, there are pockets of limestone that contain some of the deepest caves in the US. The Tony Grove area of NW Utah contains hundreds of caves, including the famous Main Drain.
Cave diving expedition with divers Jean Krejca and David Moore to push the series of sumps at the bottom of Main Drain Cave in the Tony Grove area of northern Utah. Caves are delicate and potentially dangerous places.