Home to the world's oldest functioning orrery.

The ruins of a medieval castle that once belonged to one of the most powerful families in the Netherlands.

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

Colorful and chaotic stacked hotel in North Holland.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

A dream-like maze full of strange art, surreal spaces, and fantasy landscapes to get lost in.

This public library and its impressive collection of academic books have not changed since the 17th century.

A classic red phone box converted into an informal village library.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

These ancient ruins were the final resting place of King Henry II's mistress.

Oxford University's stateliest library seems designed to make students truly feel the weight of knowledge.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

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

Peek through a transparent pyramid and drink in the mountain made of books.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.