A military museum and library dedicated to the citizen soldier.

Cemetery featuring rare glass-fronted columbarium.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

The clothes-washing king doubles as a community center with some unusual features, including an aviary filled with finches.

Where Cusack's record store from the film "High Fidelity" was located.

This 19th-century church is now a popular roller rink.

The legendary court where emerging basketball players gain their street cred.

An unassuming secret door once led to a legendary watering hole.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

A hands-on traveling collection of the innovative devices of yesteryear.

Underneath the bustling city streets, a hydroponic farm grows unique herbs in an urban oasis.

Nikola Tesla's former home contains an homage hidden from plain sight.

Unlock the secrets of the conjuring arts.

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

A science teacher's dream.

A Bibliophile's Dream.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

The world's only known button museum.