The maximum security facility was once thought to have "the bloodiest 47 acres in America."

This historic bridge has weathered fires and floods and still stands, now abandoned, where it has stood since 1874.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

This century-old roadside attraction is full of bizarre rock formations.

Alabama has a fiberglass Stonehenge. With apologies to Spinal Tap, this one is full-size.

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

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

Developers built a Walmart around one family's plot and constructed a mausoleum in the parking lot.

What else would you call a playground hidden in Alabama's oldest and largest cemetery?

This abandoned cemetery has a dark past of bodies buried over bodies.

A desert settlement founded and later abandoned by Hawaiian members of the Church of Jesus Christ of Latter-day Saints in Utah's Skull Valley.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

A peaceful, unique botanical garden complete with waterfalls, mini islands, and swans.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

A secret, rocky playground hidden amongst the plain white beaches of the Florida coast.

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

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

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

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

Rather than a run-of-the-mill franchise hotel, this lodging has been decked out in dinosaur decor.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

There are eight natural springs around town, each with a slightly different taste.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.