Explore the dark underground corridors of this graffiti-covered former military fortification.

The highway's southernmost spot is a beloved local attraction.

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

"We Seceded Where Others Failed."

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

The third tallest lighthouse in America once guided author Stephen Crane to safety.

A monument celebrating the idea of reaching inaccessible places.

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

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

A tribute to Ponce de Leon's supposed quest for eternal youth.

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

Inside this store, a mysterious statue draws visitors from the world over.

Stairs often replace streets on the steep slopes of this old mining town.

A Wild West jailhouse that slid down the mountainside.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

This sanguine boulevard was named after a deadly cowboy bar fight.

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

A spiritual vortex among the red rocks in Sedona.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.