The Gulf of Oman is a region of diverse landscapes and rich history. Stretching between the coasts of Oman, the United Arab Emirates, and Iran, this gulf is lined with stunning shorelines, port cities, and hidden natural gems.

One of the major rivers of the Iberian Peninsula, the Douro in north-central Spain and Portugal just might be the world's most beautiful wine region. Most of the river on the Spanish side isn't navigable, so river cruises generally travel roundtrip from Porto, on the coast of the Atlantic.

Sitka is a coastal community on Baranof Island in Southeast Alaska, set between the forested slopes of the Alexander Archipelago and the waters of Sitka Sound. The city has a compact waterfront setting surrounded by temperate rainforest, islands, mountains, and productive marine waters. Sitka's location gives it a strong connection to fishing, boating, wildlife, and outdoor recreation, while its streets and historic buildings reflect both Tlingit and Russian influences.

Todgha Gorge is a dramatic limestone canyon in Morocco’s eastern High Atlas Mountains, close to the oasis town of Tinghir. The Todgha River has cut a deep passage through the mountains, leaving towering rock walls that rise to around 300 meters in places. At its narrowest, the gorge contracts to roughly 10 meters across, creating a striking corridor of stone and sky.

Colonia del Sacramento is where time lingers. Founded in 1680 by the Portuguese and later contested by the Spanish, the town’s past is etched into its cobblestone streets and weathered facades. The Barrio Histórico, a UNESCO World Heritage Site, is compact enough to walk in an afternoon yet layered with centuries of stories. Visitors can explore remnants of the original city walls and climb the iconic lighthouse for sweeping views of the Río de la Plata.

Half Moon Bay is a coastal city on California’s San Mateo County coast, located south of San Francisco along a broad curve of the Pacific shoreline. The community is surrounded by agricultural land, coastal bluffs, sandy beaches, and rolling hills, with the Santa Cruz Mountains rising inland.