The sign at the garden gate reads: "These Plants Can Kill."

A crumbling hospital from the 1850s on Roosevelt Island.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

While it now takes more than a dime to open an account this historic Brooklyn bank still displays the opulence of the gilded age in which it was built.

Sniff the Titan Arum's rotting flesh.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.