European castle ruins in an American state park are actually the product of death and grief.

Away from the crowds of fishing enthusiasts, take a hike deep into the woods and journey into an eerie darkness.

These pink granite water slides are the result of millions of years of erosion.

Giant granite rocks standing end-to-end like a train of circus elephants.

Erosion and time have created a naturally-formed water park.

This small turbine mill along Rocky Creek was built in 1928

The deepest spring in Missouri.

An underground river pushes more than 200 million gallons out of this Missouri spring every day.

A historic, scenic mill that was forced to close due to overlogging.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

It's as if the herds walked straight out of a fairy tale into the Missouri wilds.

One man's love for East Coast diner culture brought an entire eatery all the way from New Jersey to Colorado.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

A seven-story 1920s mausoleum outside Denver houses thousands of remains.

This restored farmhouse is a time capsule of a 19th-century Colorado homestead.

This now-abandoned outcrop is an important Native American spiritual site, overtaken by European settlers and mining pollution.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

The graffiti-covered ruins of an abandoned trading post in the middle of Navajo Nation.

This 100-foot tall bluff located in the western plains of Kansas overlooks a massive reservoir.

A dazzling display of red rocks weathered into spires and hoodoos.

This bird-shaped rock formation defies gravity, time, and classification.

Some 2,000 carvings show this rare desert spring has been an oasis for travelers for over a thousand years.

A small flooded ghost town with a few scattered structures remaining.

These otherworldly limestone formations jut out from the Kansas prairie.