Travelers on the Arabian Sea often find themselves in Muscat, on the Gulf of Oman. This port capital is situated between ocean and mountains, and boasts lovely beaches, great diving sites (watch for turtles!), 16th-century forts, and the impressive Sultan Qaboos Grand Mosque, which can hold 20,000 people.

Bright red Molja Lighthouse beckons you to explore Alesund, the tiny seaside town along the western fjords of Norway. A popular destination for Norwegian cruises, this coastal jewel will charm you with a colorful harbor, verdant natural beauty, and fresh seafood.

Key Largo, the northernmost of the Florida Keys, is renowned for its pristine natural beauty and vibrant marine life. As part of the Florida Keys archipelago, Key Largo is a gateway to the spectacular underwater world of the John Pennekamp Coral Reef State Park, the first underwater park in the U.S. Here, visitors can explore vibrant coral reefs through snorkeling and scuba diving, or take a glass-bottom boat tour to marvel at the colorful marine ecosystems without getting wet.

Yucatán, a Mexican state, is popular for its Gulf of Mexico beach areas and spectacular Mayan ruins. It is bordered by the states of Campeche and Quintana Roo. Mexico’s Yucatán Peninsula is also home to mystical cenotes—natural sinkholes filled with crystal-clear water.

San Nicolas, known as Aruba’s “Sunrise City,” offers a completely different vibe from the island’s resort-heavy northwest coast. Located at the southeastern tip, this former oil refinery town has reinvented itself as the cultural heart of Aruba, filled with vibrant street art, local galleries, and a strong sense of community.