Mammoth Caves National Park is over 400 miles long and is the world's longest cave system. Taking a cave tour will lead you 200 feet below the Earth where you'll find miles of stalagmites and stalactites and waterfalls during rains. Apart of the Green River in south central Kentucky and established in 1941 as a national park, Mammoth was definitely a highlight of the Kentucky Derby trip! Who knew?
Taking the New Entrance Tour at Mammoth Caves - gorgeous!