A ruined castle stands atop a hill surrounded by dragon lore.

Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.

One of the world's heaviest musical instruments towers within a popular urban park.

The first passenger cable car in the world.

A historic fire call point.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

This gravestone and its inscription inspired a movement that has spanned generations and saved countless lives.

Also known as “Robin Hood’s tree,” it became a famed location along Hadrian's Wall before it was cut down.

This temple was constructed entirely by Roman soldiers.

This fountain of a little boy that spits on passersby at erratic intervals is a town icon.

Every half hour the eye-rolling clock face sticks out its tongue to mock the good citizens of Koblenz.

A rare and unique example of an 18th-century door latch calls this restaurant home.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

The former headquarters of history's oldest megacorporation.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

A cemetery for Slovenian notables also serves as a popular recreation space.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

The mark of the Devil's horns on a marble column in Milan.

The secret medieval communication system will whisk your words above the noise of the crowd.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

A real (but thankfully not live) missile stands tall as a monument to the United States military in the small town of Cordele.