This community on a small Venetian island has taken to painting their houses in bright neon hues.

A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

The house where the famed outlaw was shot by a dirty coward is now a museum to the criminal's legacy.

This massive blockhead sculpture hides an entire library.

For a couple of months each year this Swedish city turns into a festive neon phantasmagoria.

Following the trail of an old metro line, this scenic path is haunted by a creepy spriggan statue.

This abandoned Civil War fortress is slowly being swallowed by the waters of Lake Borgne.

This famous city eluded concrete detection until the early 2000's.

Abandoned city hidden from the world by tropical forest and isolation on the coast of Kenya.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

Built by the patron saint of illusionists this Elizabethan manor house is riddled with secret cubbies for hiding priests.

An English artist has turned an unassuming ex-council house into a time-lost house of mystery.

Travelers exchange letters with woodland creatures at this mini post office.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

This Japanese-inspired labyrinth of hot springs is hidden in a Chilean forest.

The middle finger of modernity.

This iron and wood Civil War city-ship was the first vessel to be sunk by an electrically detonated torpedo.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Right up until the 20th century this network of man-made caves was the biggest village in Eastern Armenia.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

This museum showcases the history and contributions of the U.S. Army to the medical industry, both on the battlefield and off.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.