Dublin's "Dead Zoo" serves as a window to Victorian museum design.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

Go inside a revolutionary, cage-less zoo where 70 species of monkeys roam free alongside their human visitors.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Now a museum, this building was once a 14th-century monastery and the place where the founder of the Dutch nation lived and was assassinated.

A seven-century-old jail tells a not-so-pleasant history of crime and punishment.

A miniature city, once ruled by the Queen of the Netherlands.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

The world's first interactive human body museum also serves as a chair for a giant orange man.

Oldest Museum of the Netherlands is a true cabinet of curiosities.

A beautifully eclectic mix of architectural styles.

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

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

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

360° views of the city plus five floors of optical illusions and hands-on science.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

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

Terrifying derelict military hospital once housed a recuperating Hitler.