Just north of Cancun, this seaside resort community is a far cry from the spring-break crowd. Bordered on one side by the Mexican Caribbean and the other by a wetlands wildlife preserve, the vibe in Playa Mujeres is one of laid-back luxury in a natural, untouched landscape. Unlike many other such tranquil places, Playa Mujeres is not a pain to get to. It's an easy ride from Cancun airport.

Isla Mujeres offers a wide variety of tempting options for beach lovers, and is a relative bargain. Snorkel with tropical fish amid coral reefs, skim the blue waters by kayak or boat, or windsurf along the shores of soft, sandy beaches. On land, you can sunbathe, dine on seafood, dance to Latin rhythms, tour on a moped or belly up to the bar for fresh, delicious drinks.

Puerto Morelos, a peaceful village on the Mayan Riviera, is a place to experience the genuine Yucatan. Puerto Morelos makes an excellent base if you’re looking for someplace quieter than glitzy hotspots like Cancun and Playa del Carmen. Government eco-reserve designations protect the reef and mangroves—and the village itself—from development. Outdoor options range from thrilling jungle and diving adventures to serene bike rides or moped explorations.

Most visitors to Playa Paraiso stay at one of the five huge Iberostar-branded resorts in town. Judging from the TripAdvisor reviews, everyone from honeymooners to families with kids can have a blast at the properties’ beaches and pools. Two excellent golf courses are also located in town.

Stretching from the fishing village of Puerto Morelos to the biosphere reserve of Sian Ka'an, the Mayan Riviera offers an unforgettable Caribbean coastline experience. Divers and snorkelers will be dazzled by the wrecks of Xcaret and the Puerto Morelos reef. Use a zip line to descend into the sacred subterranean caverns of LabnaHa Eco Park, where you can snorkel an underground river under a canopy of stalactites. The nearby Tulum Monkey Sanctuary will put you in a playful mood.

One of the top diving destinations in the world for its bright storybook coral reefs, the island of Cozumel is also home to a variety of natural beaches. Choose a beach with soft white sand for relaxing, or snorkel off a rockier vista. A destination for both adventure and romance, Cozumel has a year-round Caribbean climate, untrammeled jungle and abundant nightlife.

Puerto Aventuras mingles tropical beauty with the riches of the sea. Beaches are fantastic, with powdery, white sand, and there's excellent fishing as well. For a fun day, explore the eco-archaeological park Xcaret, or snorkel at Xel-ha, a natural inlet water park. The Mayan ruins at Tulum, only 25 minutes away, are another must-see.

Akumal means "Place of the Turtle" in the Mayan language, and if you snorkel here, you just might see one swimming alongside you. (Don’t touch it, though. That’s prohibited by law.) You’ll definitely see coral and beautiful fish in the clear, sparkling waters. This tourist-friendly little town is about an hour south of Cancun—but it seems light-years away.

Myrtle Beach is a family-friendly beach destination—which means in addition to great beaches, there’s plenty to do when the kids are sick of making sand castles. Amusement parks, water sports and golf courses are nearby. And family-friendly dining and hotels abound.

Well-priced, all-inclusive beach resorts are the norm around Puerto Plata. Take a cable car to the peak of Mount Isabel de Torres, enjoy a concert at an amphitheater facing the Atlantic Ocean, visit the 16th-century San Felipe Fortress. Explore the nearby falls of Damajagua, snorkel off the beautiful island of Cayo Arena or play a round of golf in spectacular surroundings. Then discover the neighbouring towns of Cabarete, a kite-boarding hub, and Sosúa, a picturesque beach spot.

Mexico's fastest-growing resort area offers miles of empty desert and deserted beaches. Laid-back nightlife and old-fashioned fun in the sun is the Cabos' lure. Only certain beaches are safe for swimming, however, including Lovers' Beach and the more tempestuous and aptly named Divorce Beach. Whale-watching, hang-gliding, snorkelling, antique-hunting, golf and fishing, Loreto's historic mission, and sport fishing and dining in capital La Paz are other attractions. SuburBaja buses travel the coast.

With four of the state's most popular beaches, Narragansett is a favorite summer destination of Rhode Island residents. Scarborough State Beach alone has 2,325 feet of sandy beach frontage. Once a wealthy community rivaling nearby Newport, the rich history of Narragansett is still visible. The Towers, spanning Ocean Drive, is the only remaining section of a luxurious casino built in 1883. Having survived numerous fires and vicious nor'easters, The Towers is the town's most enduring landmark.

Everything about Santa Monica sizzles, from hundreds of funky shops and restaurants to more than three miles of white sandy beach, to the multitude of celebrities zipping into the local airport and out on Montana Avenue. The subject of popular songs, movies and television shows ("Baywatch" was one of many filmed here), the city has a vibe like no other. Hollywood haute couture meets surfer chic meets hippie casual, and somehow it all works. A word of advice: ditch the car and walk everywhere. Santa Monica is small and prides itself on being pedestrian- and environmentally friendly. You won't need wheels at the auto-free Third Street Promenade, a stroller's paradise known for its multitude of cinemas, restaurants and street performers. Or at the famous and historic Santa Monica Pier, home to tempting smells from fast-food stalls and the solar-powered, nine-storey high Ferris wheel that has long been a symbol of the city. If your feet start to fail, hop on the electrically powered Tide Shuttle, a bus service that runs along the beach offering great views plus a ride to the artsy Bergamot Station and the Santa Monica Museum of Art, or your next spirited Santa Monica destination.

Just its location—in the Sacred Valley of the Incas—makes Urubamba sound like a mystical, magical place. The snow covered Ch'iqun mountain stands proudly in the background of this Peruvian town that serves as a base for people who want to visit the famous ancient Incan ruins of Machu Picchu. Zip lines and horseback rides let you experience this valley in the Andes in wildly different ways.