A student driver's nightmare.

The final resting place to 300 Victorian-era pets hides inside the city park.

A traditional American farmhouse plopped in the middle of a Piccadilly courtyard.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

A mysterious artist-run cabinet of curiosities and library.

Repository for more than 22 million pickled specimens.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

Pop culture has helped to keep this iconic British building from being destroyed.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

A fiery-red region of scooped out land still largely untouched by civilization, tourists or otherwise.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.

This awesome Spanish castle is so fantastical it was actually used on Game of Thrones.

A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Two stunning 17th-century libraries and a cabinet of curiosities.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

This toxic spoil heap found a second life as a ski slope, popular film location, and wildlife haven.

This secret garden has bloomed into London's most unique hub of urban creativity.

Visit on a Sunday morning to see some killer tricks.

The Tudor-style cottage in the middle of the square is not quite what it seems.