The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

Ho Chi Minh's perfectly preserved body has been on display here since 1975.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Paris' linguistic guide to the international language of, yes, love.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Home to Alan Turing, the cracking of the Enigma code, and Captain Ridley's shooting party.

The most northern place on the mainland of Great Britain.

The sign marks one of the endpoints to mainland Britain's longest overland travel route.

A sea cave with a waterfall and Viking past

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

The most loyal of little dogs, or a Victorian era publicity stunt?

Largest lake in Great Britain measured by surface area.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

360° views of the city plus five floors of optical illusions and hands-on science.

A fascinating and enormous collection of natural history exhibits stained by a dark colonial legacy.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

Tintin's creator is celebrated in an immersive museum that's an astounding work of modern art.

This memorial museum chronicles the apocalyptic destruction of the First World War.

A collection of weird and wonderful art fills a former houseplant nursery.

A moving memorial to the fallen and missing from WWI trenches.