This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

Pennsylvania's own Roswell-style UFO mystery.

A larger-than-life statue of America's favorite sundae marks the place it was invented.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

The "lovely red Vega" of the legendary record-settling pilot.

It was once the base for a series of domestic terror attacks.

There’s a hidden military meme engraved on the World War II Memorial.

Home to items never before seen by the public.

This elaborate towering structure was once famed for its revolutionary height.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

Yo, Adrian!

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

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

Rusting away on the edge of New Jersey are the remains of a Cold War missile launch site.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

Step inside Lucy, the world's largest "elephant."

The world's largest fully steerable radio telescope.

A reproduction of earth's many biomes.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.