The ruins of a paper mill destroyed during the Civil War still tower over a tributary of the Chattahoochee River.

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

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

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

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

An underground magnet for ever-changing street art.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

Try a classic Necco candy bar being resurrected in a small suburban shop.

No one really knows how these old hobby horses got here, but the herd keeps growing.

A historic bridge with a lovely acoustic anomaly.

A man in a plane delivers Christmas packages to lighthouses.

A lighthouse on a diminutive island was one of the first of its kind to guide seamen home.

The ruins of one of the first railroads in the U.S. lie hidden within a neighborhood cul-de-sac.

From economic backbone of a community to deadly diving hole, these former stone quarries are now a park for rock climbers and graffiti artists.

This supermarket is suspended 25 feet above an interstate highway.

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

An enormous, inside-out glass globe built in 1935.

Ice cream stand, snack bar, and time capsule of milk conveyance.

Dim sum, served in a grand old theater.

Silverware in the sidewalk outside a grocery store cements this neighborhood’s Italian culinary history.

This small shop walked so America could run on Dunkin'.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

Beautiful steampunk ghosts of early Massachusetts.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.