Underground tunnels remain beneath this abandoned mental asylum.

This shop for all your super spy needs hides an educational secret.

A spooky and decrepit mental health facility is slowly being replaced with newer digs.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

Birthplace of America's first documented serial killer.

America's oldest archaeological site or a muddled case of wishful thinking.

A museum devoted entirely to the rattlesnakes and snake-related art.

This is one really big nut.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

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

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

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

A preserved factory in the "Home of the Carrousel" is now a museum dedicated to the classic wooden ride.

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

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

This World's Fair showpiece was built in Chicago, but shipped to Maine.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

A house carved into a rock in the 1940s.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

A self-built castle made by a mysterious man.

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

A New York garbage depot holds a secret collection of weird and wonderful refuse.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.