After a full day on the beach, climbing Maya pyramids, or swimming in cenotes, you may want to do nothing more than enjoy a quiet dinner and perhaps take a post-meal walk underneath the stars. If you are up for keeping the party going, however, Playa del Carmen’s Fifth Avenue is perhaps the liveliest area in the Riviera Maya after the sun goes down. The busy street that runs parallel to the town’s beach is lined with bars and international restaurants serving a cosmopolitan mix of travelers from around the world. Whether you want to simply stroll and take in the scene or spend a night dancing, Playa del Carmen is a popular choice. The beach resorts, bars, and restaurants of Tulum offer a quieter alternative. The atmosphere here is more low-key—perfect if sipping a handcrafted cocktail at a restaurant or open-air lounge overlooking the moonlit sea is more your speed.