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

One of the oldest, tallest, and most haunted lighthouses in America.

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.

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

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

A replica of one of the more than 15,000 civilian lookout towers that lined the U.S. coast during World War II.

Faded remnants of the entrance to a Mediterranean-style resort that never fully came to life.

What started as three small gnomes at the base of a tree has grown into a full-blown gnome home.

This stretch of highway is said to be haunted by ghosts of settlers whose graves were paved over.

The "I-4 Eyesore" is one man's dream that has stood incomplete for over 20 years

Loyal fans of one television's most famous painters still come to pay their respects.

Millions of pieces of Venetian glass showcase the life of Christ.

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

Where serial killer Aileen Wuornos drank her last beer.

One of the largest Native American shell middens stands 30 feet tall.

A local road runs around a memorial to a teenager who died in 1860.

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

These mysterious ruins are hidden amid this sleepy coastal city.

In this small strip mall resides the largest collection of original art from the famed TV artist.

Mariners once used this prehistoric landfill as a navigational landmark.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

A swamp that was the site of prehistoric water burials also managed to preserve its corpses for millennia.

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

Measuring approximately 200 feet long, Swampy is the world's largest alligator-shaped building.