Two years ago, scientists surveyed the floor of Lake Michigan looking for shipwrecks. They found something mysterious and ...

Among its most renowned features are the Blue Lake and the Umpherston Sinkhole, a limestone cave that has been transformed ...

That’s far deeper than other notorious sinkholes like Deep Lake or the 1981 Winter Park sinkhole. But you’re not likely to hear about it. The "Mystery Sink" stretches an estimated 500 feet ...

In Polk County, Florida (which includes Lakeland, Winter Haven, Davenport, Lake Wales and ... USGS states, sinkholes are most common in "regions where the types of rock below the land surface ...