A remnant of the Roman army's presence on the coast of Scotland.

A pair of mosaics marks the spot where the last accused witch of Dundee was put to death.

Each section of this public work of art represents one of the city's guilds.

This mural condenses 96 miles of one of Scotland's best-known trails into a unique art display.

Three large boulders covered in mysterious carvings and graffiti.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Macabre astrological automaton clock dating to the late 1400s.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A highly-criticized monument in Budapest has become the site of a makeshift Holocaust memorial.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

The unexpectedly beloved remnants of a controversial thermal power plant.

Designed to illustrate two parts of the human psyche.

The heads of two giant mythological water horses honor Scotland's horselord past.

Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

A hands-off space for graffiti artists to hone and display their skills.

This popular square's history as the former site of a church is right beneath your feet.

The little-known second castle that William the Conqueror built in York.

The final resting place of England's most notorious bandit.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.