It looks like another world down there! Dress as if your heading out to the beach and wear tennis shoes. I've been to a handful of caves and this one really takes the cake.
I prefer the Hidden Passages tour over the main tour (Discovery) because it's limited to a set number of people, it's guided with more details given, and the added experience of total darkness.
There are 2 caves here and each has its merits, we like the original cave better than the more recently discovered hidden passages cave. There's a ropes course and zip lines, too
Wear comfortable non-slip shoes, I wore tennis shoes. You will get wet from natural water droplets and puddles. Be hydrated 99% humidity. There’s a lot to do and price is fair.
Check out the "combo" ticket that gets you both the original tour and the "hidden passages" tour. The hidden passages tour is lots of steps rather than an inclined path.
Come for the cavetours. Everything else is a tourist trap. Try to keep up with the guide. It's hard to do if you want to take long exposures. Prepare to sweat!