A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

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

A beautiful but toxic fountain of mercury.

Mountain where Jesus was first tempted by the Devil.

This cemetery features modernist statues as strange as its name.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Many of Edinburgh's more unsavory characters spent their final days behind this door while awaiting their executions.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

This tower was constructed to commemorate the man who helped bring true democracy to the United Kingdom.

World's largest bell sits on the grounds of the Kremlin in Moscow.

Former headquarters of the KGB.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

Celebrate the end of the Great French Wine Blight with a festival of kissing.

Some of the saint's blood and bones are said to reside in Dublin.

The people of Padua pledged to construct this church if the city was spared from destruction during World War I.

The Egyptian-inspired last resting place of Lord Kilmorey.

An abandoned tank sits in an empty London lot as a symbolic middle finger to local city planners.

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

This luxury shopping lane has been protected by its own tiny police force for over a century.

At high tide, the base of the lighthouse covers practically every inch of the island.

A gallery specifically dedicated to the botanical illustrations of a remarkable traveling lady.

A public urinal so pretty, it was declared a national monument.

This lone tower casts an outstretched shadow over the site of a once-wealthy Knights Templar preceptory.

"The Donut" was built as part of an expensive, ill-fated engineering endeavor.