A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

This former Norwegian sailor's church is slowly being taken over by ramshackle robot musicians.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

Less a museum than a bizarre fantasy world created by artists and engineers.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

This free, take-a-book shop seems like a trick but isn't.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

An essential stop before plundering, BYO Cutlass.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

A mysterious castle built as a monument to lost love.

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

An abandoned castle owned and ignored by Masons carries a cursed history.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

A common entry point to the Griffith Observatory trail holds its own wonders.

Despite the ever pressing encroachment of urban sprawl this grand New Orleans manse still stands.

This woodland architectural installation acts as a camera obscura for the heavens.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

A reproduction of earth's many biomes.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.