Tulum

"While not as large as other ancient Mayan cities in the region, Tulum draws in visitors for its stunning setting of centuries-old temples perched on a cliff by the Caribbean Sea. You’ll pass a large market with souvenirs, a casual Mexican restaurant, and even a Starbucks before reaching the entrance, where a train can take you to the site if you’re not up for the 10-minute walk. It’s advisable to hire a guide to fully understand each structure’s significance and the history behind the ruins; informative signage is all but nonexistent. Don’t forget to bring your swimsuit, as the site encompasses a white-sand beach with soothing waves and beautiful rock formations that’s reached by a long wooden staircase."