Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

The ornate structure is part of a building boasting more marble than the Vatican.

A hidden plaque is the only reminder of the lost palace where two storied English kings were born.

A semi-abandoned village destroyed by U.S. bombings during World War II dominates the valley of Turano.

This massive library holds what was once the largest book collection in the world.

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

Guests can stay at a hotel in the former French abbey where lie the tombs of King Henry II and King Richard the Lionheart.

Bloodstains can still be seen in this medieval church where two medics saved lives on D-Day.

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

The site of the first medieval crusade that pitted Christians against Christians.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

The birthplace of the ferocious William the Conqueror, this castle is awash in medieval history.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

This giant sculpture made of trash is a critique of society's wastefulness.

This single-track road rewards brave drivers with stunning Scottish scenery.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

A tiny replica of the iconic London landmark hides on the side of the steel structure.