While your cruise ship is in St Thomas, make the most of the Caribbean waters around you on this 6-hour snorkel and sail adventure to St John. Board a single-mast sail ship and head for St John's pristine waters — many of them protected as part of the Virgin Islands National Park. Then, visit some of the most popular snorkelling spots to explore a spectacular underwater world of exotic fish, corals and perhaps even turtles and rays. Between snorkels, relax on deck with complimentary unlimited drinks and a delicious buffet lunch.