We went back to Carlsbad Caverns for another look on Thursday. During our previous visit we had entered the caves via the man-made entrance down the elevators under the visitors center. This time we went to the natural entrance.
There is a large population of bats that live in the caves. Every evening at sunset they fly out of caves to eat. There is a large amphitheater at the natural entrance where people sit to watch the flight. In a way it is really neat that you can go see that but on the other hand I find it a bit bizarre that flying bats is the only performance ever viewed in this theater.
We did not go at sunset to see the bats but we did descend into the caves through this entrance. A long hike down (over 750 feet) we used the elevators to come out.