4,000 monkeys used for medical testing on an island off of South Carolina.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

An autonomous oak in Alabama.

A failed, un-built suburb that has been going feral for decades.

One of many gator theme parks, abandoned in the sugar fields of South Florida.

The only Florida state park with publicly accessible caves.

The site where Confederate president Jefferson Davis was defeated has been marked with a bust... that leaves that part out.

This historic oak tree has been around for over 300 years and might last for 300 more so long as it doesn't fall apart first.

The haunting remains of a failed housing development can still be found behind the big box stores that were to anchor them.

Get up close with some alligators at this roadside farm attraction.

One of the world’s largest and deepest freshwater springs, where mastodons once roamed.

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

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

This picturesque ghost town is located on the banks of the Suwannee River.

The giant squid's 27-foot-long corpse lies preserved within a Sarasota aquarium.

This Florida resort community is where the Amish come to have fun in the sun.

The abandoned bathhouse is all that remains of the hot springs considered Florida's original tourist attraction.

A luxuriant botanical garden below sea level.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Where manatees are the snowbird vacationers in these balmy Florida springs.

It's a pretty creepy lock-up.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

St. Augustine's record-setting narrow street was designed to protect against pirates.