Mammoth Cave NP - KY

Mammoth Cave system is the longest in the world (405 miles and growing) and is a World Heritage Site. At the visitor centre we picked up trail maps, booked a couple of cave tours for later on in the week and looked round the exhibit. Then had a great hike through the lush forest down to Echo River which flows out of the cave system and back up via the Mammoth Dome Sink Hole. Hitchhiker butterfly joined us for a while on Stew's head. Feeling the heat with temperatures in the 80s F.Læs mere