I got the pictures back from cave tubing at the same time as the ones of the rays. Here are some pictures of us cave tubing last January.
This shot is taken when we were drifting through the cave, it was pitch black in front of me and I turned around and took a picture of the entrance. Last bit of natural light we saw for awhile as the cave had twists and turns and was longer than we expected.
Finally there is light at the end of the first cave.
Bob making faces. This was before he punctured his tube in the rapids.
The group heading into the second cave. As you can see there was quite a large group. Once we got through the caves, we found we got to shoot rapids and Bob punctured his tube on an underwater root that was sticking out. We managed to both hang on to my tube and made it safely through the rapids. Our guide then traded tubes and we continued on while the guide had to hike and swim the rest of the way.