Abandoned railway line circling the city of Paris.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This rare polygonal meeting house is rumored to be built in a circle so that the devil has nowhere to hide.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

A New England curiosity cabinet, one hundred years on.

One car at a time please.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

A treasure trove of rare and fine fabrics from around the world.

Only known mainland rookery of the threatened Stellar sea lion.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

World's largest permanent maze made of 18,000 conifers.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

The world's longest and deepest train tunnel.

Featuring Zürich's only authentic 14th-century plague doctor's uniform!

One of a series of no-purpose kinetic artworks by Swiss sculptor Jean Tinguely.

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

Video games, body language, and postal history are all on display in this Swiss museum.

Museum featuring strange and enchanting toys of the past.

Traversing steep Alpine slopes, this engineering marvel is one of the longest and highest funiculars in the world.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

Decades before the scandal, this staircase on the river was a literal "water gate."