Not only does Costa Maya have excellent conditions for diving and snorkeling, it also boasts a true rarity: Banco Chinchorro Biosphere Reserve is a coral reef located around 18 miles off the coast of Mahahual. As part of the Mesoamerican Reef, the second largest coral reef system in the world, it is home to a diverse array of marine life as well as dozens of sunken ships, some of which date back to the 16th century. You can find a multitude of dive centers along Mahahual's boardwalk, Malecón.

Kalahari's transparent roof lets the sunshine in while you stay warm indoors during the winter months at the largest indoor water park in the nation. Features include the Swahili Swirl 60-foot bowl raft ride, Zimbabwe Zipper uphill water roller coaster water slide, Cheetah Race 4-lane mat slides, Rippling Rhino and Victoria Falls raft rides, and much more.

Marina Village is a palm-lined waterfront esplanade where luxury yachts are moored. Dine al fresco in one of the fine restaurants with views to the southern Whitsunday Islands or enjoy water-based activities such as snorkelling, fishing, jet skiing and parasailing. Next door is Harbour Beach and the Pine Islet Lighthouse — the only working kerosene-lit lighthouse in the world.

While there's plenty to so in Charlotte Amalie on land, it would be a great loss not to explore the underwater wonders of the U.S. Virgin Islands. The easiest thing to do is rent a snorkel and explore the shallow waters by the beach, but you should definitely consider trying something more advanced at least once. Snorkelling is the cheapest choice. Add some diving equipment to go deeper and see more. Some tours now offer Sea Trek helmets — a modern take on the diving helmet. No matter your choice of equipment, do explore the coral reefs that are home to tropical fish such as snapper, hamlets, parrot fish, sturgeon, squirrel fish and majestic sea turtles.