An autonomous oak in Alabama.

The remnants of the fortress that saved Georgia from the Spanish still stand guard on their swampy island.

The art studio of an early 20th-century painter, hidden amid the Great Smoky Mountains.

Mysterious library of an infamous financier and spiritual seeker.

This replica of the Greek structure is in the heart of Nashville.

A delightful park featuring homemade scale replicas of dinosaurs, tucked away in the Tennessee mountains.

Walk the whole Mississippi River!

This structure among the trees was the result of divine inspiration.

Hiding behind a grocery store is a spectacular cavern carved as part of an old limestone quarry.

A curiosity-seeker's paradise set inside a three-story historic school house.

Beautiful waterfalls grace a canyon visibly torn by a violent tornado.

An enormous natural sandstone bridge in Kentucky.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

A museum to a cave explorer whose tragic death was a media sensation, and whose corpse became a tourist attraction.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

Three courses accompanied by Christian rock.

This tiny 19th-century tunnel was built so a man could move his cows from one field to another.

The juke joint where legendary soul artists ate, drank, and made merry.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

Visit this playground of waterfalls, caves and sinkholes.

These early tent-shaped grave coverings are unique to Appalachia.

All that's left of the quintessential "cabin in the woods."

Tucked away atop a quaint Alabama pharmacy is this tiny display of antique medical tools.

Purdue students would lean over this iron fence to skirt campus rules against smoking and courting.