We just happened to be introduced to Sergio after having a few drinks at Flayva's. We booked a tour to the ATM caves with him and, although he was sick the day of our tour, we still had an amazing time with his son as our guide. I can't imagine a tour like this being available in the USA with all of the potential for lawsuits, so it was cool that we could find adventure in Belize.
The cave tour included swimming in cold water, climbing through caves in complete darkness, hiking through the forest, and viewing some of the most amazing artifacts. Instead of seeing these treasures through glass in a museum, we were able to see them up close in person inside of the caves in which they have been for the past 1,000 years.
Also, after the tour, we happened to bump into Sergio again and he hung out with us for about 90 minutes just drinking, smoking, and talking. He has some pretty amazing stories, so if you get the chance, offer him a beer and see if he has time to share a story or two.
Sergio, sorry we didn't find you again at Flayva's the day we got back from Tikal. We dropped by to tell you how it went, but we must have missed you.