Top 3 Largest Caves in the World

1. Mammoth Cave National Park

 Mammoth Cave National Park is a U.S. National Park in central Kentucky, encompassing portions of Mammoth Cave, the longest cave system known in the world.

-->
The official name of the system is the Mammoth-Flint Ridge Cave System for the ridge under which the cave has formed. The park was established as a national park on July 1, 1941. It became a World Heritage Site on October 27, 1981, and an international Biosphere Reserve on September 26, 1990.

 The park's 52,830 acres (21,380 ha) are located primarily in Edmonson County, Kentucky, with small areas extending eastward into Hart County and Barren County. It is centered around the Green River, with a tributary, the Nolin River, feeding into the Green just inside the park. With 400 miles (640 km) of passageways it is by far the world's longest known cave system, being well over twice as long as the second-longest cave system, South Dakota's Jewel Cave, which has just over 157 miles (253 km) of known passageways.

2. Sistema Sac Actun

 Sistema Sac Actun (from Spanish and Yucatec Maya meaning "White Cave System") is an underwater cave system situated along the Caribbean coast of the Yucatán Peninsula with passages to the north and west of the village of Tulum. Exploration started from Gran Cenote (20°14′47″N 87°27′51″W) 5 kilometers (3.1 mi) west of Tulum. The whole of the explored cave system lies within the Municipality of Tulum (state of Quintana Roo).

In early 2007, the underwater cave Sistema Nohoch Nah Chich was connected into and subsumed into Sac Actun making it the longest surveyed underwater cave system in the world for some months. Sac Actun measures 215.4 kilometers (133.8 mi) (after connecting Sistema Aktun Hu with 34 kilometers (21 mi) in January 2011) and is second surpassed by Sistema Ox Bel Ha at 232.8 kilometers (144.7 mi). These two cave systems since early 2007 have been frequently exchanging the title as the longest underwater cave system in the world.Including two connected dry caves (Sistema Yax Muul and Sistema Pierre′s East) makes Sistema Sac Actun with 218.0 kilometers (135.5 mi) the second longest cave in Mexico and the sixth longest worldwide.

3. Jewel Cave National Monument

 Jewel Cave National Monument contains Jewel Cave, currently the second longest cave in the world, with just over 157 miles (253 kilometers) of mapped passageways. It is located approximately 13 mi (21 km) west of the town of Custer in South Dakota's Black Hills. It became a national monument in 1908.

Posted in: Amazing,cave,Largest,places,top