This was one of the best tours I’ve ever been on! Our guide Echo was fantastic! He added so much to the experience with his knowledge of local flora and fauna, and, of course - enthusiasm! The underground river is breathtaking, I will never forget it as long as I live and I implore everyone to visit this UNESCO world heritage site at least once in their lifetime! The mangrove forest boat was also excellent and supports the local community. We didn’t try the zip line but heard there’s spectacular views from it! Lunch was plentiful and vegetarian options and considerate of allergies etc.