Toxic waste disaster that founded the Superfund program.

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

An abandoned 19th century quarry in the middle of the woods, remade by unnamed wanderers into a massive series of rock thrones.

This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

This collection started by a Cornell professor once held more than 600 human brain specimens, including the one that belonged to its founder.

Haven for steampunks.

This was one of the first (and last) university-built and operated nuclear reactors.

The artist and New York City icon lived, worked and died in this converted carriage house owned by another iconic artist, Andy Warhol.

More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

This locally-famous crevasse in New York State is icy all year round.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.

Salute the leader of the proletariat.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.

Not even a series of devastating fires could keep this odd castle in upstate New York from bouncing back.

Town full of spiritualists, some of whom are mediums, is still in full swing after 130 years.

A Manhattan office building is home to the world's largest chess board.

A partially hidden wall graffitied by spectators of the 1976 Bicentennial, recently rediscovered.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.