The world's longest known cave system.

This collection of ferns from across the globe is the largest assortment in the United States.

This wondrous hideaway is suspended in a bamboo forest above a sanctuary for rescued llamas and alpacas.

A late-night restaurant empire was launched from this humble storefront.

The statues commemorate the legendary mass killing of escaped circus monkeys.

Suspended above the ground in a thicket of towering Georgia trees is a modern architectural wonder.

Unruly residents were housed in this one-person cell until the Black Maria arrived.

An oddity shop filled with taxidermy, funerary memorabilia, and more.

This stone is a marker of one millionaire's personal vendetta against gravity.

One of the only remaining vestiges of baseball's Negro Leagues in Atlanta.

Atlanta's strange assortment of concrete pillars inspires reflection in some, confusion in others.

For the last eight decades, this curious shop has been ridding Atlanta of bad juju.

Tour the sci-fi-esque reality of governmental disease management.

The home of a 19th-century author who brought African-American folktales to the mainstream is now Atlanta’s oldest house museum.

The only subterranean ping pong table in Atlanta.

A psychedelic tribute to one of Georgia's most unique artistic visionaries, out of place and time in the heart of Atlanta.

The largest cemetery in the American Southeast is a hidden gem near the heart of Atlanta.

A mass grave for victims of an airline disaster that led to much-needed safety improvements for commercial flights.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

A half-acre utopia in the New Mexico desert features a graveyard, a game of horseshoes, a library, and a mailbox.

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

These aggressively sustainable art homes look like something out of 1970's science fiction.

Reproductions of nine banned oil paintings coyly hidden behind a curtain in a New Mexico conference room.

A multi-storied adobe complex has been inhabited for more than a thousand years.