Monday, Aug 17, 2020, 1:17 pm

By:Tony Williams

#7 Gourffre Berger Cave - France

Three thousand six hundred and eighty feet deep, the Gouffre Berger Cave is located in France, 1000 feet below the earth's surface. The first cave to be exploited, it is named after Joseph Berger, the Frenchman who discovered the colossal cavern. Explorers access the cave via ropes from the top, propelling all the way down.