A historic observatory precariously perched at the "Top of Europe."

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

This lovely little bridge hidden in a Switzerland gorge is essentially a fairytale.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

These spooky and unusual stone formations create an underworldly landscape.

There's nothing creepier than a cemetery next to a clown motel.

The U.K.'s first underground railway line is now a lively thoroughfare for runners and cyclists.

The world's first ice hotel is still one of the most elaborate and beautiful.

This historic train station has been converted to a locomotive themed hotel.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

Colorful and chaotic stacked hotel in North Holland.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

Hundreds of samples of "Devil's Rope" hide in a defunct vintage elevator.

This remarkable collection devoted to the study of fish includes 1 million preserved specimens from all around the world.

An enclosed rotunda at the Henry Art Gallery in which viewers can look up and see the uninterrupted sky.

A collection of odd-shaped and quirky sounding instruments handmade by a midcentury inventor-composer.

A prehistoric geological oddity tucked behind Stockholm's natural history museum.

A rare surviving Victorian greenhouse designed specifically to house giant water lilies.

Suspended above the ground in a thicket of towering Georgia trees is a modern architectural wonder.

The private clubhouse for the members of the Academy of Magical Arts.

The first (but not only) upside-down house in Germany.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

Behold, a collection dedicated to Germany's favorite vegetable.