On the southern tip of the Riviera Maya, white-sand beaches stretch for miles at this up-and-coming ritzy-yet-earthy beach destination. A haven for fashionable transients and spiritual locals, Tulum, which uses solar generators and wind turbines to keep its lights on, is a stylish low-key escape where yogis retreat, jungle junkies wander, and celebrities dip their toes in the pristine sand. In addition to the famed ruins and Sian Ka’an Biosphere Reserve, a must-see in Tulum is the cenotes — the watering holes and natural phenomena that are something out of a majestic storybook, with fresh water on the surface and deep seawater below. Grab your suit or snorkeling gear and head to Dos Ojos or Gran Cenote for hidden, crystal-clear swimming.