The travel website TripAdvisor used traveler reviews to choose its top 10 World Destinations on the Rise. The list represents 10 cities that saw the biggest increase in positive traveler reviews in the past year. The number-one pick? Tulum, Mexico. The seaside city is on Mexico’s Caribbean coast. It is known for its beaches, warm, clear waters, and Mayan ruins. Tulum was one of the last cities built by the ancient Mayans, the pre-Columbian culture in Mesoamerica and Central America. Beyond the city’s beaches and Mayan sites, Tulum is also famous for diving and snorkeling. Adventurous travelers can explore caves and underground rivers.