A statue honors the children who fought Nazis in Poland.

The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

This small memorial is almost as well concealed as Smalls himself was on the night he sailed to freedom.

Paths are maintained, but trees have taken over plots.

The final resting place of the Seminole Indian chief who fought against government occupation in Florida.

Oldest unrestored plantation house in America that is open to the public.

One of only two commuter aerial tramways in the United States.

Site of the first pathological and bacteriological research facility in the United States.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A crumbling hospital from the 1850s on Roosevelt Island.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

A small piece of the composer's New York home lives on in the center of Czech culture in Manhattan.

The mysterious image is believed to show Edward Hyde, 3rd Earl of Clarendon, in a beautiful blue dress.

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

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Bowl in splendor, if you're lucky.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

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

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

Historical figures from New York City's Catholic community reside in Midtown.

A hidden "place of interment for gentlemen."