According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

The 1940s structure houses what was once Europe's largest telescope.

After protestors toppled a statue of a 17th-century slave trader, the pedestal where it once stood remains unoccupied.

Designed in the Romanesque style, this structure was once a fortress monastery.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

This cannonball embedded in the side of an Edinburgh house once served a surprisingly pedestrian purpose.

A rare pod of derelict midcentury Futuro and Venturo houses lines a semi-abandoned beachfront resort outside Taipei.

The first Catholic church in Singapore is a Neo-Gothic colossus with a rich architectural history.

Roman-era ships unearthed...

A former Roman town that was once the home of Scipio Africanus.

Science fiction's grandfather has a fittingly marvelous tomb.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

This church carved into the rocks is full of enchanting stone statues.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

Flying high, this unusual hornet statue celebrates the local soccer team formerly owned by Elton John.

The site of the notorious Great Train Robbery of £2.6 million, one of the biggest heists in English history.

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

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

This long unused shot tower on the Mississippi remains a point of pride for a small city in Iowa.

The storefront of a ramshackle Parisian puppet theater.

This facility has manufactured stunning tapestries for France's royalty ever since the 17th century.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

This unique, full-sized copy of the Bayeux Tapestry sports a few modern additions, including underwear.

A fully functional, 200-year-old remnant of the time when Brixton was mostly fields.