What shoes would you suggest? I only have flip-flops, but should I wear real tennis shoes?

Flip flops would not be a good choice. Some paths are step and/or slippery.

Thank you everyone! I just got done a bit ago from taking the tour. I ended up wearing my flip flops and a side from getting my feet wet, I was totally fine! 😊

I would recommend the tennis shoes.there are places that are wet and when going into the cave your mostly walking down. And coming out of the cave walking upwards to the opening... Might get your toes wet. Lol Really thou Go.. It's Awesome

Yes, sturdy shoes for the basic tour , it can be damp even wet walking on inclines.

I wore sandals, but they have a little grip to them. Flip flops are probably not recommended.

Tennis shoes