Supposedly Satanic numbers adorn this preserved submarine sail.

This museum glorifies the humble potato.

See massive fossils that are over 200 million years old in northeastern Arizona.

Museum dedicated to awful artwork.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

This massive World War II calculator hearkens back to the days when "computer" was a job title.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

Civil War-era Fort designed to withstand invasion and attack, with tricky traps called "murder holes."

Civil War Fort on an island in the Boston Harbor.

An eccentric inventor's castle home with its own indoor weather system.

This picturesque abandoned home is rumored to be a spite house.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

This church in Pittsburgh is home to the largest collection of religious relics in North America.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

Less a museum than a bizarre fantasy world created by artists and engineers.