An aerial photo taken in April 2020 shows the scenery of a giant sinkhole in China. A forest with trees over 100 feet tall was found at the bottom of a sinkhole earlier this month.

Xinhua News Agency/Getty Images

Cave explorers stumbled upon a prehistoric forest at the bottom of a giant sinkhole in South China. The hole is also known as theHeavenly pit in Chinese.

The Washington Monument would be hidden at 630 feet deep. There is an ancient forest that spans nearly three football fields in length, with trees over 100 feet high. According to the Chinese government, it's one of 30 enormous sinkholes.

The cave explorers discovered the hole outside the village of Pinge. According to a news release, a team of explorers descended into the pit on May 6 and found ancient trees and other plant life.

According to the U.S. Geological Survey, Karst is a type of topography that is ideal for geological wonders such as the sinkhole in Leye County. Carlsbad Caverns in New Mexico is one of the attractions that are part of the United States.

The Guangxi region is one of the best examples of its beauty, as it is covered by karst topography.

George Veni, the executive director of the National Cave and Karst Research Institute, told Live Science that the Karst landscapes vary in size and shape.

Veni said that in China you have this incredibly visually spectacular karst with enormous sinkholes and giant cave entrances. Only a meter or two in diameter are the depths of the holes. Cave entrances might be small, so you have to squeeze your way in.

The Institute of Karst Geology of the China Geological Survey is the sister organization of Veni's institute. The dense brush on the forest floor is shoulder-high, and the prehistoric trees at the bottom of the pit are almost 130 feet high, according to the news release.