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

These ruins are all that remain of what a Spanish barrack that likely housed a quarry overseer, masons, and stone cutters involved in the construction of the Castillo de San Marco.

Bronze footprints mark the path where a civil rights leader tried to march in peaceful protest before being knocked unconscious.

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

Only through the lens of a microscope can visitors see the true treasures inside this museum.

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

Location of a reliquary containing bone fragments of 18 saints.

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

The graves in Florida's oldest Black cemeteries are marked with shells, stones, and mementos of the deceased.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

The Home and murder site of the witch of Rehmeyers Hollow.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

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

Hundreds of skulls and bones at the largest skeleton museum in the country.

Japanese gardens dedicated to the Japanese farmer that refused to throw in the trowel.

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

Crumbling Kennedys and a decaying Tecumseh are just some of the haunting remains of one man's cement art trail.

Home of an evil witch famous within southern folklore.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

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

Ruins of a Carnegie family mansion on Cumberland Island.

Georgia's first brewery is also one of its oldest surviving buildings.

The remains of a chapel created for convenience.

World's largest magnetic research facility.