This four-story steel sphere in Maryland was used to test biological weapons.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

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

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

It's a pretty creepy lock-up.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

A former hospital is now home to a pizza parlor and maybe a few ghosts.

One of the best places in Florida to spot rare, carnivorous pitcher plants.

A building so large that it has its own weather.

Believed to be haunted, this old cemetery is beautifully adorned with Spanish moss hanging from the trees.

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

The trials and tribulations of marking Poe's grave.

Local legend says that someone is buried in the trunk.

This steamer is known as "The ship that built Cleveland."

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

This Boy Scout retreat acted as "Friday the 13th"'s original Camp Crystal Lake.

This ominously named New Jersey street seems to be attracting over-the-top legends of its own making.

The legend of a local monster still haunts this small town.

A headstone tells the sad story of a lost little boy and his pet dog.

The largest ancient burial mound in Ohio.

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

Location of a reliquary containing bone fragments of 18 saints.

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

Intertwined, interspecies trees which locals believe can grant boons to lovers.