When ecosystems collide in the arid Southwest.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

The highest bridge in America was built for an almost unnervingly small amount of money.

The largest self-built castle in the U.S., six decades in the making.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

This naturally-sourced hot spring is now home to a clothing-optional resort.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

Nature and art meet in this curvy creation

Just outside the Ohio Supreme Court sits a testament to justice.

An unassuming 13-acre park is home to over 12,000 roses.

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

From a canyon-like gorge, more than 20 million gallons of water emerge every day, while a smaller spring drips down, creating the illusion of an endless, gentle waterfall.

The longest of the four remaining covered bridges in Missouri.

Some of the oldest exposed rock formations in the United States.

This small turbine mill along Rocky Creek was built in 1928

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

The largest riverfront opening cave in the Ozarks.

Rusted and decayed, this former mining site is a portal to the past.

Outside the Missouri Quilt Museum, this large spool has more than one million yards of thread—and counting.

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