Island ghost town detailing Flagler's folly in building the Overseas Railroad.

Dedicated to the victims of one of the deadliest hurricanes to strike the United States in recorded history.

This lush Florida island is home to the ruins of a crooked ship breaker's tiny empire.

A unique collection of diving equipment spanning antiquity to the present day.

The famous boat that once ferried Bogart and Hepburn still floats in Key Largo after being abandoned for years.

This post-war motel embodies a little-known, Miami-born architectural style.

This small beachside park commemorates the possibilities of discovery.

A tribute to a hometown hero and surfing legend.

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

A building so large that it has its own weather.

This ancient octopus-like tree was saved from destruction thanks to shady reporting.

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.

A sweet tribute to Georgia's official state vegetable, which even has its own mascot: "Yumion."

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

A fascinating aviation museum where you can chat with the veterans who once flew the aircraft on display.

The site of the notorious Camp Sumter Prison is now a peaceful memorial.

A real (but thankfully not live) missile stands tall as a monument to the United States military in the small town of Cordele.

This 13-foot smiling peanut in Georgia helped Jimmy Carter win the 1976 presidential election.

HFH's slum simulation is either a noble recreation of poverty or a cringeworthy attempt at same.

The ruins of an important pilgrimage destination for worshippers of a Maya fertility goddess.

This one-of-a-kind convent boasts a kaleidoscopic exterior of stars and double-headed eagles.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.