Mammoth Cave Visitor Center
Address: 1 Mammoth Cave Parkway, Mammoth Cave, KY 42259-0007
Mammoth Cave is the longest known cave system on Earth, with more than 426 miles of surveyed passage dissolved into 330-million-year-old Kentucky limestone, and people have explored and mined it for thousands of years. Above ground, the Green River winds through forested hills.
Join an easy ranger tour to the Frozen Niagara formations and walk the forest trails above ground; young kids can earn a Junior Ranger badge. For a challenge, book the Wild Cave Tour: six hours of crawling, climbing, and squeezing through undeveloped passages.
Coordinates: 37.18702, -86.10107