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

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

Where serial killer Aileen Wuornos drank her last beer.

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

A building so large that it has its own weather.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

A monument celebrating the idea of reaching inaccessible places.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

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

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

A Circus legend leaves an unexpected endowment.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

The first custom-designed building to showcase the works of Dale Chihuly is a wonderland of glass and light.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

Once featuring over 60 miniature replicas of famous Chinese locations, the Splendid China theme park was completely abandoned and is now mostly rubble.

A glimpse at Walt Disney's vision for a "community of tomorrow," in miniature.

Disney World's very first waterpark is now an abandoned ruin being reclaimed by the swamp.

A vast array of tropical plants collected by a vacationing couple.