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.

Georgetown, Guyana’s capital, is a city of wooden cathedrals, tree-lined canals, and street corners alive with music, food, and political discussion. Located at the mouth of the Demerara River, the streets still follow the Dutch grid system, and the city’s architectural signature, with its elegant wooden buildings with louvered shutters and fretwork, make it one of the most visually distinct capitals in South America.

If you find yourself in Rotterdam, there's a strong chance you've arrived by water. This popular port city (the second largest in the Netherlands) has gone through an architectural renaissance since World War II, with daring, innovative structures dotting the city (cube houses!) and defining its skyline. Café culture is on the rise here, so grab yourself a table and a cup.

Lake Como, nestled in the Lombardy region of northern Italy, offers a sublime retreat with its stunning landscapes and elegant charm. Renowned for its crescent shape and crystal-clear waters, Lake Como is framed by lush hills and dramatic mountain scenery. The lake's picturesque towns, such as Bellagio and Varenna, showcase charming cobblestone streets, historic villas, and lush gardens.

Seen from the train, Durham presents a magnificent sight, with cathedral and castle perched atop a bluff enclosed by a loop of the River Wera, and linked to the suburbs by a series of sturdy bridges.