An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

A reproduction of earth's many biomes.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

It looks like a whale, it's part of Yale, and it's best-known by a nickname you can probably work out for yourself.

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The headquarters of the famous Yale society.

A former copper mine which became a truly unsuccessful prison.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

The modern birthplace of Irish freedom.

This lighthouse and shipwreck museum keep a torch burning for the memory of the SS Edmund Fitzgerald.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

World's largest Christmas store.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

The only surviving prototype for Buckminster Fuller's house of the future.

Astounding collection of coin-operated games and automata.

Strange physical sensations and optical contradictions keep visitors coming back for more.

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