A city in perpetual forward motion, Abu Dhabi greets visitors with gleaming skyscrapers and opulent Islamic architecture. There is much to see here, from the recently opened Louvre Abu Dhabi to the gigantic Sheikh Zayed Grand Mosque, with its white marble splendor. Beach life and turquoise waters can be found on Saadiyat Island, Al Bateen and Corniche Beach.

Sighisoara rises above the Târnava Mare River as one of the few medieval citadels in Europe that is still lived in and admired today. Its historic center has been on the UNESCO World Heritage List since 1999, recognized for its long history as a fortified Saxon settlement and its role in trade and defense on the edges of central Europe. Wander through cobbled alleys framed by pastel-colored houses, and the layers of time feel close at hand, from the city walls and guild towers to busy cafés.

Dominica, known as the “Nature Island of the Caribbean,” is a haven for eco-tourists and adventure seekers. Nestled between the French islands of Guadeloupe and Martinique, this lush island boasts a remarkable landscape of volcanic mountains, dense rainforests, and stunning waterfalls. Dominica’s most iconic natural wonder is the Boiling Lake, the second-largest hot spring in the world.

The Darvaza Gas Crater, famously nicknamed the “Door to Hell,” is one of Turkmenistan’s most extraordinary landmarks. Located deep in the Karakum Desert, this fiery pit has been burning continuously since the early 1970s, when Soviet engineers reportedly set fire to a collapsed natural gas field to prevent the spread of methane.

Krujë sits on a rocky hilltop above central Albania and has long been a symbol of the country’s history and independence. At Krujë Castle ancient stone walls rise above the town and offer striking views of the surrounding hills and valleys, and inside the fortress visitors find the Skanderbeg Museum, where armor, documents and displays recount the life and battles of Albania’s national hero.