A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

France's most famous cemetery, with some of its most curious tombs.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

A must for film lovers in Madrid and home to the Spanish Film Library's projection space.

You can soak in three relaxing pools filled daily by the tide.

Blue-green pools and smooth stones comprise one of Spain’s most idyllic hidden wonders.

Volcanic rocks ground down into sand make this Spanish beach as black as night.

The former 1920s mansion of a prominent Catalan developer was used as the Soviet Embassy during the Spanish Civil War, and there is still a bunker below the garden.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

These 100-year-old tunnels in downtown Provo house artists, restaurants, and a few surprises.

Pay your respects to a folk-punk legend.

An extraordinary final resting place full of oversized art, amazing statues, and dead celebrities.

A magnificent, reportedly haunted mansion built for a composer by Spiritualists.

This dark, quiet forest on the outskirts of San Diego is dense with rumor and lore.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

The site of murders and Satanic cult gatherings.

San Diego's most historic and haunted home.

Often mistaken for an office building, inside this venue is an amazing collection of Native Alaskan art.

This shrine to the patron saint of Alaska sits on a small tidal island and was built from the land’s own beach stones.

This London plaque marks the spot where David Bowie's famous alien made his debut.