This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

A rare view of a preserved Victorian science museum.

Site of the first official transatlantic wireless communications.

This park pays homage to the region's rich industrial history of brick making.

These unusual rooms on wheels are holdovers from the 1960s.

It may appear to be a fancy junk yard, but each item has a story to tell and a lesson to impart.

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

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

Three plaques mark the spot where the "forgotten father of broadcasting" worked.

The site of the worst mining disaster in Ohio's history.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

What started as a way to address damp basement walls turned into a house filled with intricate hand-carved designs.

In the middle of an abandoned stretch of old Route 50 lies a tombstone that weighs three tons.

This massive monument honors the first human in space.

One of the few surviving examples of the first lock and dam system built on the Ohio River.

A unique museum dedicated to culture and artistry of carpet weaving.

This pair of eccentric Ohio castles were built by a pair of brothers who wanted to bring a bit of class to the Ohio wilderness.

This ornate mosque is said to hold the remains of Muhammad's granddaughter beneath its dome of pure gold.

An art deco ice cream shop covered in vintage train station tiles.

The oldest brick house in the state of Ohio.

This unique zoo is the only place in the world where you can see all 15 species of crane.

The remains of a enormous earthen figure of unknown origins cuts across a rural Wisconsin road.

"There's nothing there," and other lies the KGB told us.