Largest gathering of hobos in the country has been meeting annually since 1900.

An underground wonderland in Iowa.

An unlikely Transcendental Meditation haven in the American Heartland built around the ancient Vedic principles of balance and harmony.

Piled high inside this warehouse and coffee shop are salvaged goods that span every corner of the globe.

Chilly air billows out from the entrance of an abandoned mine on a steep hillside, providing a refuge for Ice Age fauna and flora.

The remains of a bustling turn-of-the-century park built to showcase the wonders of electricity.

The notorious couple camped at this site after a bloody shootout with police.

An eclectic assortment of medieval architecture in a small Iowa town.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

An old town theater converted into a celebration of the hobo legacy.

Home with Gothic windows featured in a famous painting.

A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

Despite repeated attempts to make it work, this former mining town is now nothing but dust and memories.

A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

Before its closure in 2002, this South Dakota mine was the largest and deepest gold mine in Western Hemisphere.

Once a thriving town of 100, Argonne was abandoned around 1970.

A crumbling ghost town on the South Dakota prairie.

A relic of roadside lore and perhaps the first of its kind in North America.

A ghost town now swarming with dozens of prairie dogs.

Known as "The Hill of the Little Devils."

The cliff and rock formations are made out of Sioux Quartzite.

This sculpture gallery is home to magnificent beasts made of scrap metal and found objects.

Abandoned businesses, homes, and rusted cars are all that remains of this stopover town.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."