A detached cement mixer has been transformed to resemble a relic from some obscure NASA mission to Oklahoma.

This pebble beach is so beautiful that taking its rocks is against the law.

Nonprofit art center that promotes outsider, intuitive, and self-taught art.

In Chicago, a pizza-enthusiast has opened a museum dedicated to the history of pizza.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

The world's largest public collection of PEZ memorabilia.

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

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

A computer bug so primitive it was an actual insect.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

Where the U.S. government kept its actual treasure, before Fort Knox.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

You can spend the night as an honorary lighthouse keeper in this quaint, historic beacon.

The world's largest indoor go-kart racetrack is hiding in Connecticut.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

This beach-side arcade is believed to be the oldest penny arcade in America.

The oldest still-operating tavern in the United States was once owned by a pirate.

This last stalwart of the now-forgotten feminist restaurant movement has been serving food in an activist atmosphere since 1977.

An actual piece of the Moon, brought down to Earth by Apollo 15.

An easy-to-miss plaque marks the building that first held this 19th-century telephone innovation.