Unrepaired walls from a 1920 anarchist bomb attack.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

A trove of century-old litho stones from the Puck Building's printing days were discovered behind a cellar wall, and are now hanging in the store.

The last remnants of what was once one of the world's grandest hotels can now be found in a Manhattan subway station.

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.