The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

This imprint of an old computer keyboard has a unique backstory.

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

Founded by the famed children's book artist, this museum spreads an appreciation of the arts through picture books.

Eclectic collections, artwork, and some feline friends fill the writer's former home.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The names Lúthien and Beren can be found inscribed on the shared grave of the famous writer and his beloved wife and muse.

The world-record holder for the longest bridge stretching continuously over water.

Whimsical cookie-themed plaques mark the birthplace of the Fig Newton.

It was an experiment to prove that glacial boulders and rocks can be used in constructions and dwelling.

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

The highway's southernmost spot is a beloved local attraction.

A coastal rock outcrop with mysterious inscriptions variously attributed to Native Americans, Portuguese, Phoenicians, Norse, and more.

Oldest synagogue in the United States.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

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

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

The fairy tale castle of the "fairy-tale king."

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

The mysterious headstone of an unidentified bank robber was seen visited, every year, by a woman in black.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

A tiny monument to the classic American candy.

This beautiful architectural gem was the first waste treatment facility in Boston.