The highest waterfall between the Rockies and the Appalachian Mountains.

The seventh largest spring in the world.

Two gushing waterfalls of hot spring water within a block of each other.

These waterfalls can be twins or triplets, depending on how much it's rained recently.

This one-room schoolhouse in rural Arkansas dates to the 1920s, but looks like it could be the 1820s.

A home designed to be on the cutting edge of comfortable, low-cost living.

The remains of the first public diamond mine in Arkansas.

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

An extravagant western hotel where every floor is the "ground floor."

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

This historic bridge has weathered fires and floods and still stands, now abandoned, where it has stood since 1874.

An abandoned early-20th-century boomtown sits within the Calico Rock city limits.

The Ozarks' strangest dwelling.

This century-old roadside attraction is full of bizarre rock formations.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

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

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

Every year, festive decorations appear on this juniper tree located in the median strip of a busy highway.

This abandoned horse racing track was an exercise in hubris from its inception.

Outsider Art Community.

The world's largest military aircraft cemetery.

This abandoned bootleg attraction was built to cash in on the popularity of classic TV show, F Troop.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

Dozens of elaborate works of automotive art have been preserved at this Arizona museum.