The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

Native Americans built this circle of stones, which was used to predict astronomical events.

A rapidly disappearing glacier filled with extinct grasshoppers, perfectly preserved in the ice.

At the time of its completion, it was the tallest dam in the world.

This Wild West attraction is alive with glitching automatons.

This replica of an 8th century burial ship actually sailed to Norway before returning home to Minnesota.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

The ravine where Jesse James supposedly performed an impossible jump to evade capture.

A riverside park built around the ruins of a massive dam that collapsed in 1909.

This erect, phallic geological spire wasn't always named so domestically.

The pharmacy's retro ice cream mixer is one of the last of its kind.

A fitting attraction for the corn capital of the world.

An experimental, automotive replica of Stonehenge.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

Only place outside China and India where two overhead DC power lines cross.

The ruins of Theodore Roosevelt's beloved ranch stand in a forgotten corner of a national park named after him.

The first declared National Monument in the United States.

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

One man's quest to save his town with a trail of record-breaking sculptures.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

Just a man taking his prehistoric pet for a stroll.

This monument remembers one of the manliest men of the frontier who fought a grizzly before dragging himself 200 miles to safety.