A combination of natural factors – climate, the Belize Barrier Reef, over 450 offshore Cays (islands), excellent fishing, safe waters for boating, scuba diving, snorkelling and freediving, numerous rivers for rafting, and kayaking, various jungle and wildlife reserves of fauna and flora, for hiking, bird watching, and helicopter touring, as well as many Maya sites – support the thriving tourism and ecotourism industry. It also has the largest cave system in Central America.