Carlsbad Caverns

We got in Carlsbad in time to go to see the Bats fly out of the cave. Learned a lot about Bats and did enjoy it until an uninvited guest showed up and the Lady Ranger had to go and escort him out (Rattlesnake). Now where we were was quite a hike back to the car and the sun was going down and I was going to the car before it got dark. Sam all the bats I wanted to see. I couldn't get any pictures because they don't let you take any. I did buy some and will get them downloaded and put them on later.
These next few are the drive in the Caverns Park as we drove to the top.

I wonder what is in that hole in the next picture?