An eerie, existential museum dedicated to the author of "The Metamorphosis."

NYC's legendary underground network for bovine transportation.

The "Seinfeld" diner.

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

This abandoned subway station can still be seen on regular commuter trips.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.