The Mexican beach resort of Cancun, with its white-sand beaches, coral reefs and nightlife, attracts more than 3 million tourists a year.
The area's transformation in the 1970s from a small Caribbean fishing village into a strip of nightclubs and high-rise hotels has reduced biodiversity and polluted water resources as infrastructure struggles to keep up, critics say.
Furthermore, the loss of mangrove swamps, which form a natural barrier against hurricanes, to make way for hotels and other buildings has increased the risk when natural disasters strike, according to environmentalists.
In the high season from about December to early April, tourists from the United States, Europe and further afield crowd the resort to swim and snorkel off usually pristine white beaches, party in the resort's many nightclubs and play golf. Cancun is also popular with Mexicans.