With plenty of scuba diving locations, Mexico is a diver’s delight. Cozumel’s dreamy deep-blue cenotes are just one of the many reasons why this area is a coveted snorkelling site, while Isla Mujeres (one hour away from Cancun) is where you can snorkel alongside hundreds of whale sharks. Don’t worry, though—they won’t bite, as they are filter feeders, just like whales!