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

Northern Ireland's Brobdingnagian stepping stones.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Famously misunderstood wonder of the ancient world

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

Macabre astrological automaton clock dating to the late 1400s.

Notorious artist squat renovated into legal studios.

The world's only museum devoted to the wonders of fluorescence.

The ghostly remains of an accidental sea.

A snapshot of the city's fascinating voodoo culture.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

The fairy tale castle of the "fairy-tale king."

A church of bones, decorated with 40,000 human skeletons.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

An emerald-green grotto just a short trip from Austin.

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

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

Boise State's stadium was the first non-green football field in the world.

This sanguine boulevard was named after a deadly cowboy bar fight.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

See massive fossils that are over 200 million years old in northeastern Arizona.

This former rail stop in Utah was abandoned, repopulated by some nostalgic friends, and now is home to a single DIY aviator who lives in a hangar.

Come for the speed, leave in love with the desert.

Rippling sand dunes frozen in the Arizona rock.