Grand Cayman is the largest of the Cayman Islands with an area of 76 square miles and a population of around 30,000. It is known around the world for its famous Seven Mile Beach. For early birds, an early morning walk along the beach is a wonderful experience. The beaches of Grand Cayman are spectacular and are enjoyed by thousands of visitors each year. The island economy is heavily dependant on tourism, with as much of 75% of the island's GDP being tourist generated. Aside from numerous beaches, there are many attractions on the island. Grand Cayman and the Caymans in general are very well known for their diving and snorkelling. The island features many reefs and walls, some of which can be accessed by swimming from shore.