Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

This blue behemoth of a bear is a colorful homage to Brown University's mascot.

Mysterious stone tower featured in many alternative histories of the New World.

The vaguely man-shaped root that ate the body of the founder of Rhode Island.

A 60-room castle constructed by a horse-racing heir.

Ironically this massive termite is the mascot for a company that is acclaimed for killing his kind.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

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

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

In the early 1800s, surgery was also a show.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

This ostentatious Italianate palace of an Oklahoma billionaire is filled with several themed mini-museums.

Travel through the hidden underbelly of the city in colorful tunnels filled with art and history exhibits.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

It reportedly took three years to sort through all the objects in this eclectic lifelong collection.

One of the best examples of Art Deco architecture in the United States.

One of the largest Masonic temples in the world, created at the height of the oil boom in ostentatious style.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

The childhood home of one of Ohio's favorite sons, pilot and war hero Eddie Rickenbacker.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

This massive airship factory is so large that it has its own indoor weather.

A wonderful and easily overlooked museum tucked in Ohio's Burke Lakefront Airport.