Climb to the top of its spiral spire for spectacular views of Copenhagen.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

Elegant marble and old vaults fill this historic Dutch bank turned office space.

Building Men of War and Indiamen from Holland's Golden Age.

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

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Yugoslavia's biggest underground airport lies in ruins.

This ghost town in Belgium will lose its street art when it ceases to exist.

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

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

The sign at the garden gate reads: "These Plants Can Kill."

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A historic observatory now an astronomy museum beautifully situated at the moat of the Middle Age city centre.

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

This Polish cave has housed a dragon, a brothel, and an enduring legend.

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

A submerged archeological park still holds the wonders of a Roman Sodom.