Mammoth Cave - New Entrance: This was one of the tours we did at Mammoth Cave National Park. The Mammoth Cave system is the longest cave system in the world. There are 367 known miles of rooms and passageways in this cave, and they say that every year they discover more. It is amazing! There is a year round constant temperature of 54º so it was comfortable inside with a jacket on. This tour takes you through a manmade entrance to the cave, and you have over 500 steps to get down and out at the other opening. You go down through all these narrow passageways and go into different rooms. This is one of the only parts of the mammoth cave system that is wet, so there are stalactite and stalagmites and other formations in this part of the cave. One of the most famous is the frozen Niagara. It looks like a waterfall in the rock - very cool! This tour was mine and Larry's favorite of the four tours we did. It was really fun and Rhyan held my hand and walked the whole way. Thats a lost of stairs for her little legs, we were impressed!