5Maya Riviera, Mexico

The Maya Riviera on Mexico’s Yucatán Peninsula is home to some of the world’s most stunning beaches.

However, places like Playa del Carmen and Tulum have been overwhelmed by tourism in recent years. The once-pristine beaches now suffer from pollution, beach erosion, and crowded resorts. Additionally, the natural environment, including the coral reefs, has been damaged due to overuse and lack of proper management.