Beaches are what traditionally bring honeymooners to Playa del Carmen. But in-the-know shoppers head to Quinta Avenida — Mexico’s answer to Fifth Avenue. Also on the scene: restaurants, art galleries and luxury boutique hotels like Acanto Boutique Hotel and Residences. Bonus: The beach is only 500 yards away. Come evening, the hotel will set up a dinner for two on the rooftop — the best place to enjoy Kobe beef carpaccio, grilled lobster risotto and kicking views of the city.