How did a massive marine arthropod find its way to landlocked Ohio?

See the nearly two-century-old ruins of pre-railroad America at the former site of a lock on the Ohio and Erie Canal.

The 25th President's marble casket can be visited in this classical Ohio tomb.

All that remains of a gigantic earth-moving machine.

In this relatively flat state the highest point is an honored place.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

The final resting place of the most famous sharpshooter.

There are more than 4 million bricks inside this unofficial Lego museum in a former middle school.

This humble star-gazing center touts itself as the "Birthplace of American Astronomy."

A real flying saucer, contracted by the U.S. Air Force.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

The angel of death appears to weep black tears at this grave marker.

Faces carved into the cliffs create an otherworldly walking trail.

A wild trout fishery in Arkansas.

On the side of Arkansas' Great River Road stand the remains of a forgotten World War II POW Camp.

Town not known for anything except its strange name.

Three markers installed over the course of 140 years mark the point where Arkansas, Missouri, and Oklahoma converge.

Bronze statue marks the spinach capital of the world.

The only diamond mine in the world where you can keep what you find.

One of the world's largest telescopes, stares into the night sky with two huge mirrors.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

This miniature feudal castle was built on a whim to honor a US Navy pioneer.