Xunantunich Cave tubing and zip line Triple combination tour are for those looking for an adventure of a lifetime. There is nothing like the thrill of flying free like the birds or sitting back to enjoy being carried lazily through mysterious caves and under the shade of nature’s lush canopy. Considered one of the hottest new adventure sports and rated number 1 in Belize, the cave tubing and zip line excursion allow you to embark on every traveler’s dream adventure.