A public art piece that barely gets recognized, but then that might be the point.

The dance of this huge clock is a magnificent and eerie commentary on good and evil in the history of humankind.

The building where Mary, Queen of Scots was said to have bathed in white wine.

The colorful stairs are made with marble from the world's major quarries.

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

A succession of eerily contemplative iron figures lead from a Scottish museum to the sea.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

Now home to a drinking establishment, this building has a macabre history.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

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.

A book bound in the skin of an infamous criminal, along with countless other specimens.

This small sculpture honors a shuttered bookshop that was the site of a fiery act of protest.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

A sweet symbol marks the place where torturous executions were once carried out.

Elaborate tile work in this railway station tells the story of Portugal.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

The French leader's hat sits in a glass case at the oldest restaurant in Paris.

The narrowest street in Paris.

France's national museum of scientific and industrial instruments.

Hidden within the waterfront hills resides this dilapidated military stronghold.

One of the oldest Christian churches still standing in the Americas, and almost certainly Mexico's oldest in continuous use.

A small building that loosely resembles a tooth is appropriately used as a dentist office.

A bronze statue of the famed Prussian naturalist commemorates the year he spent in Mexico.

This tiny garden was built specifically to provide a place of peace and serenity away from the busy city streets.