Opatija, located on Croatia’s Kvarner Bay, has been drawing visitors since the 19th century, when Austro-Hungarian aristocrats built grand villas along its Adriatic shoreline. Today, many of those same buildings still stand with some restored as luxury hotels and others preserved as cultural landmarks. The town’s most recognizable structure, Villa Angiolina, opened in 1844 and marked the start of Opatija’s rise as a fashionable seaside resort.

Montecatini Terme, in Tuscany’s Valdinievole region, is one of Italy’s most renowned spa towns, celebrated for its thermal waters and elegant Belle Époque charm.

Villahermosa, the capital of Tabasco, is a city where ancient civilizations, tropical landscapes, and modern life intersect. Known as the “gateway to the Mayan world,” the city sits on the banks of the Grijalva River and serves as a cultural hub for southeastern Mexico. One of its most unique attractions is Parque-Museo La Venta, an open-air museum that blends archaeology with a jungle setting.

Bandar Seri Begawan, the capital of Brunei, sits along the Brunei River and combines traditional charm with modern infrastructure. The city is known for its stunning Islamic architecture, including the Sultan Omar Ali Saifuddien Mosque, with its golden dome and marble minarets reflecting in the surrounding water.

This small yet charming city in Alaska's panhandle is a throwback to the gold rush era. Skagway is a well-preserved part of Klondike Gold Rush National Historical Park.