Secret

This secret Swiss fortress is disguised as a harmless pink house, complete with fake windows.

The secret cells in the basement of the KGB's Estonian "Grey House" have been preserved as a grim Cold War museum.

The attic of a four-century-old canal house hides a clandestine church.

This semi-hidden Manhattan restaurant is based out of a loading dock.

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

A tiny plaque hidden miles into the Washington wilderness is all that remains to honor a shipwreck that left 18 people dead.

This secret Australian garden was built on love after a man planted a random bulb he found in the ocean.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.