An old train trestle re-imagined as an Egyptian obelisk.

If all members were present at the table, a sixth of the world's wealth would be under the same roof.

Jacksonville's highways rendered this century-old grammar school unusable.

A sprawling maze of used books piled from floor to ceiling.

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

Gutted airplanes slowly decay in a Florida field.

A tribute to Ponce de Leon's supposed quest for eternal youth.

Possibly the world's oldest rug, this Egyptian relic is woven entirely from ancient cat hair and once carried a mummified human foot.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

The site of Martin Luther King Jr.'s arrest as he attempted to have lunch.

Built to replace a house destroyed by a hurricane, this home is made entirely of shipping containers.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Part of a highway network meant to connect Miami to Montreal, this 10-mile stretch of road made from red bricks is still around 100 years later.

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

The ruins of a once-thriving sugarcane plantation that was burned in the Second Seminole War.

What started as three small gnomes at the base of a tree has grown into a full-blown gnome home.

Strange beasts lurking in a garden are all that remain of a quirky, short-lived theme park.

One of the largest Native American shell middens stands 30 feet tall.

These mysterious ruins are hidden amid this sleepy coastal city.

Despite being made of a seashell mortar, the crumbling remains of this historic Florida mill are still standing.

Mariners once used this prehistoric landfill as a navigational landmark.

A swamp that was the site of prehistoric water burials also managed to preserve its corpses for millennia.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

A building so large that it has its own weather.