A 16th-century footpath said to be haunted by a young girl that died trapped within its misshapen old house.

A magnificent Victorian garden that brings the charm and style of old-time aristocracy to the 21st century public.

This 11th-century castle sits so low you can't see it behind the surrounding buildings.

Graffiti covers the walls of a room where university students through the centuries have waited nervously to defend their theses.

This old KLM airplane cut into three parts was transformed into an eclectic airport gift shop.

People have been placing babies on these lilies for photoshoots since the Victorian era.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

Science meets wall art to highlight the beauty of famous mathematical equations.

This massive mural by famed pop-artist Keith Haring was hidden for almost 30 years until its 2018 rediscovery.

This historical Netherlands fortress still bears the marks of its single siege.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

This famous archeological mystery may be an ancient example of movable type.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This demon atop the Notre-Dame de Paris looks utterly bored.

The celebrated eyesore created by starry-eyed sweethearts.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

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

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.