This cave is very different than the others in that it is earthquake formed rather than water formed. As a result there are no jaw-breaking rock formations in it, and the cave administrators have realized this too -- they put in colorful lighting to make it somewhat more appealing to tourists. I would call this one "Giant Crack Hole of Texas" as it was basically formed when earthquakes made a pit in the ground and later slammed it back together, leaving a crack under the ground. In some parts of the cave the ceiling consists of petrified mud of the down side of ancient ocean floor --- that is, this is what you would have seen if you had lifted the ocean floor and looked at it from below. Geologically I am sure this is one of the wonders in the world, but you will be disappointed if you're looking for aesthetically appealing formations or rocks that resemble animals or humans.
The first four pictures were taken with a Canon Rebel G, a Canon EF 28-135mm F/3.5-5.6 "IS" USM lens and Fuji Superia 400 film pushed one stop rated at ISO 640. The last two pictures were taken with a Canon A2, a Tokina 20-35mm F/3.5-4.5 AF lens and Fuji Sensia II 400 film rated at ISO 320.
Colorful lighting makes it look like Alice's Wonderland ... well, sort of.
Giant rocks stuck in the crack hole.
On the ceiling is petrified mud of ancient ocean floor.
All have collapsed.
Colorful lighting at its best.
A tourguide is showcasing the cave.