A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

This subterranean studio is filled with fascinating kinetic art.

This unusual elevator doesn’t stop or slow down.

A mysterious artist-run cabinet of curiosities and library.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

This bell stars in a tragic love tale and is said to make wishes come true.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

This former lieutenant governor's home is brimming with curiosities.

An unusual number plate signifies the building's saucy past.

A building that survived WWII, possibly on the virtue of its name alone.

Artists and musicians now rule over this former rail station.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

A snapshot of the city's fascinating voodoo culture.

This collection of reclaimed landmines acts as both an exhibition of their deadly history and as a shelter for children affected by them.

The wartime prison now features haunting sculpted reenactments of the atrocities that took place there.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

A lush indoor jungle fills this bustling Madrid transportation hub.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.