Discover Cozumel, a tropical paradise known as one of the best swimming and diving destinations in Mexico. Ironman has been running races there for over 15 years. Cozumel’s thriving coral reefs are some of the best in the world and the island has earned its reputation to be a premier diving and snorkelling destination. Crystal-clear Caribbean water offers great visibility to swim and explore countless coral reefs, marine life and numerous sandy beaches all year round.