What looks like a normal building is really a hollow facade hiding a subway vent.

This little-known relic crypt holds stolen parts of a Roman Empress.

A mechanized clock where a man fights off a dragon, crab, and rooster.

This banal Parisian entranceway is not what it seems.

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

An abandoned boat that's been stranded mysteriously for decades.

This eagle-topped spire remembers the military commander who snatched up California for the United States.

An archive and museum with a mind-boggling collection of Shakespeare-related objects.

This historic home has survived wars, drought, and financial woes to become a California landmark.

Every year, over 25,000 monarchs overwinter in Pacific Grove.

The oldest continuously operating church in California.

Fake rail crossings mark the site of an influential doctor's demise.

Steinbeck's old stomping grounds, immortalized in Cannery Row.

Large metal sculptures spread throughout an open landscape.

This coastal rock formation resembles a churning cauldron at high tide.

Meet cowboys and ancient beardogs at this one-of-a-kind crossroads of Western history.

Jack White's record store is the only place in the world that records live shows direct-to-acetate.

A historic area for shopping and dining in Ketchikan's former red-light district.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

A public art installation featuring clawfoot bathtubs on stilts sparks admiration and controversy from locals.

A dramatic coastline that’s home to a rare pine tree.

The world’s oldest active sailing ship.

Go deep on these fascinating fish, and get a bonus lesson on the importance of marine conservation.

Get your footwear fixed inside a 30-foot-long shoe built by an obsessive cobbler in 1947.