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

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

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

A lion given to the prime minister somehow got stuffed and sent to Florida.

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

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

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

Flip your own pancakes in this old sugar mill within a Florida state park.

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

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

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

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

This vacant church in the Financial District was once the heart of New York's first Syrian immigrant community.

This jail which was in service for over a century is now open for curious visitors.

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

The only thing better than tubing down New Jersey's scenic Delaware River is doing so while eating a hot dog from a giant floating stand.

A recently abandoned psych ward at the end of Sanatorium Road.

Once the world's largest reinforced concrete structure, this abandoned bridge now beckons urban explorers.

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

The creek where a shark wreaked terror upon New Jersey, and served as the inspiration for "Jaws."

A painfully obvious spy house sits right across the street from the Russian Embassy.

The tunnel under the Capitol Building where Congress takes out its trash.