This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

A monument to the art of slicing people open.

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

This miniature village stays behind in the Breuer Building, even as the museums around it come and go.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

A riverfront park that both remediated and preserved its industrial past.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

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

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

Lie in a hammock where George Washington stood.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A modern zoetrope on the New York City subway.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

Try not to get slimed in Tribeca.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Waterway populated with abandoned projects, including a submarine.

This small, hidden cove is home to abandoned boats.

One Brooklyn man's collection of life-size fiberglass statues has taken over his entire yard.

The highest point on the island known for buildings that touch the sky.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

Mysterious 500-year-old tapestries depict a unicorn hunt.