An ancient Viking runestone hidden in plain view in Stockholm's old town.

Sweden's "good old days" painstakingly re-created in a model village.

Stockholm's deepest subway station is also a stunning ecological wonder.

It houses the remains of a 17th-century version of the Titanic.

Fowl, love and death in Vietnam.

The pockmarks across the building's facade are remnants of the Blitz.

Hidden in the courtyard of the Victoria and Albert Museum is a little-known tribute to two celebrity pooches.

This ancient Egyptian obelisk still bears the wounds of World War I.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Hear the quietest sound from across the dome.

Climb to the top of the world's largest seated bronze Buddha.

These crumbling towers are some of the last remnants of a centuries-old Vietnamese culture.

A Surreal flight of architectural fancy in Vietnam's Central Highlands.

Monument to a brutal, ineffectual US bombing campaign and a sobering reminder of the human cost of the Vietnam War.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

Ming Dynasty necropolis raided during the Cultural Revolution.

The most famous location in China was home to whole dynasties worth of imperial rulers.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

The ancient tomb acts as a calendar that keeps perfect time.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

Once a year, thousands of naked cyclists flood the streets of a Seattle neighborhood.

In the absence of a Chinese-language newspaper, for years the community posted daily updates on this simple bulletin board.