A gargantuan crystal kingdom.

Collection of vintage trailers double as hotel rooms.

Famous for its bio-luminescent inhabitants, known as "Dismalites" .

A miniature city built by a single hunchbacked monk.

The world's first time capsule lies behind a welded steel door in Atlanta.

A curious whirlpool formation supposedly capable of entangling or engulfing branches, tree trunks, or whole rafts full of hapless tourists.

An abandoned bait shop with a front lot filled with storage boxes.

A bizarre roadside attraction and the first instance of miniature golf in the world.

Visit this playground of waterfalls, caves and sinkholes.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

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

Origin of the blue-skinned Fugates of eastern Kentucky.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

Railroad came. People came. Railroad left. Town died.

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

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Mile-long cave system near Great Smoky Mountains.

The world's largest set of the ten commandments lay nestled in the heart of the Great Smoky Mountains.