Cagliari is Sardinia's capital and largest city. Several civilizations have left their imprint here architecturally and culturally. Must-sees include the Museo Archeologico Nazionale di Cagliari, with its Roman and Byzantine treasures, as well as Castello, a medieval quarter situated on a hill above the city. The city is also known for its food and vibrant nightlife.

Part of the British Virgin Islands, Virgin Gorda is an island in the Caribbean famous for The Baths National Park, whose natural geologic granite formations dot the island's beaches and create stunning tidal pools and grottoes.

Loch Lomond, the largest lake in Great Britain by surface area, sits at the gateway to the Highlands and offers visitors a wide variety of ways to explore its islands, waters, and surrounding hills. Stretching over 22 miles and dotted with more than 30 islands, the loch has long been a source of inspiration for poets, musicians, and travelers.

The capital of Ontario and Canada's largest city, Toronto is a vibrant destination on the banks of Lake Ontario. Highlights of this striking cultural capital include the looming CN Tower (featuring a revolving restaurant), Casa Loma, Toronto Island Park, Royal Ontario Museum, and Ripley's Aquarium of Canada.

Zacatecas, built into the slopes of a narrow ravine in north-central Mexico, is a city with a deep mining past and a striking skyline. The historic center, a UNESCO World Heritage Site, is known for its pink cantera stone buildings, narrow alleys, and impressive baroque facades. The Cathedral Basilica of Zacatecas, completed in 1752, stands as one of the most detailed examples of Mexican baroque architecture, with hundreds of carved figures covering its sandstone exterior.