The World's Longest Cave System

Описание: The World's Longest Cave System is the Mammoth Cave System in Kentucky, USA. Stretching over 6,900 kilometers, it's made up of over 643 miles of underground passages. Formed over millions of years through erosion, it was first discovered in 1791. The cave system is home to a unique ecosystem, supporting rare species that can't be found anywhere else. To put that in perspective, if you walked 1 mile per hour, it'd take you over 12 days to explore the entire system. #MammothCave #LongestCaveSystem #Kentucky #CaveFacts #UndergroundWorld #NatureLovers #AdventureSeekers #Geology #Ecosystem #RareSpecies #Travel #USA #Caving #Exploration #Wildlife #Conservation #Facts #YouTubeShorts #CaveSystem #MammothCaveNationalPark