Several years back we had a 5 inch rainfall in a few hours. That opened this Sinkhole which was connected to a creek in culvert buried about 45 feet down. It swallowed a Corvette parked in front of a local restaurant. It finally spit it out several months later from the far end of the culvert. All attempts to stop/repair the sinkhole failed.
This is what was left of the 'Vette.