This titanic steel chain linking two buildings was installed without permission but instantly beloved.

The world's largest fire hydrant is supposedly tornado-proof.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

An old train trestle re-imagined as an Egyptian obelisk.

A mysterious castle built as a monument to lost love.

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

The bizarre story of the mysterious death and hidden treasure of one of Sanibel Island's early homesteaders.

The island residents are known for taking their quirky sense of humor with them to the grave.

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

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

A monument celebrating the idea of reaching inaccessible places.

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

This small Key West museum is packed with dozens of artifacts that illustrate the life of the iconic playwright.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

Four metal statues of massive animal penises stand outside the university's Animal Sciences building.

The world's largest occupied bat houses hold hundreds of thousands of flying mammals.

This underground oasis is one of North America’s most fascinating prehistoric places—and you can scuba dive in it.

In Florida, these naughty monkeys live on their own mini-monkey Alcatraz.

Meet manatees face-to-face at this zoo for native species.

This kitschy curio wonderland is full of fake animals, teak tables, and a cacophony of random bric-a-brac.

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

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

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

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