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This national park has the longest-known cave system in the world—with over 400 miles of passages and a frozen waterfall

Along with underground adventures, Mammoth Cave National Park in Kentucky offers great hiking and kayaking, too. Located in Kentucky, Mammoth Cave National Park is home to the world's longest-known ...
Travel + Leisure

This National Park Is Home to the Longest Cave in the World—and Only 426 Miles Have Been Explored So Far

Mammoth Cave National Park in Kentucky is home to the world’s longest cave system, with over 426 miles of mapped underground passages. While here, visitors can hike the Cedar Sink Trail and explore an ...
Yahoo Style Canada

Along with underground adventures, Mammoth Cave National Park in Kentucky offers great hiking and kayaking, too.

Located in Kentucky, Mammoth Cave National Park is home to the world's longest-known cave, extending for more than 400 miles. While exploring the cave system on guided or self-guided tours is a ...