A repurposed railway tunnel with otherworldly acoustic characteristics.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

Just across from the "Last Supper" painting is the famous painter's vineyard, a gift received for creating the masterpiece.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

The U.K.'s first underground railway line is now a lively thoroughfare for runners and cyclists.

The bells remain in a shattered heap exactly as they fell when the church was bombed in World War II.

A total of 999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

Water and windows define this defensive Italian well.

A Roman-style column in Oregon hides a spiral staircase inside.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

One of the last umbrella repair shops in Paris upholds the nostalgic art of umbrella making.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

A haunting collection of the vanished and disappearing natural world.

These numerous Israeli caves were dug out over hundreds years for reasons ranging from hideouts to burial sites.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

When you're a great Russian Tsar, even your vomit gets a statue.

After years of being casually peed on by humans, this tree is peeing back.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

One of only three fountains created by the iconic architect Friedensreich Hundertwasser.

This hulking behemoth is actually five interconnected towers built in the 1960s.

This tiny shop has been serving traditional tamales for more than 200 years.

Stormy conditions send jets of seawater bursting through holes in the cliffs.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.