We did a ranger-guided tour in the morning, then went upstairs to eat lunch, before we walked back down the natural cave entrance to tour the Big Room. I was very happy to know that there was hot food being served upstairs. In the downstairs snackshop, they have cold sandwiches available, which did not sound tasty. I ordered two chicken tacos, with rice and beans. It was average, not very spicy. Considering we didn't bring lunch, we were happy to have the food.