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

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

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

A monolith replica monument of Jean Ribault commemorating the landing of the French in the New World.

Alabama has a fiberglass Stonehenge. With apologies to Spinal Tap, this one is full-size.

Come for the boats, stay to explore the intriguing assortment of art.

This now-deactivated naval base defended the Florida coast for centuries.

For 150 years one family has been producing the iconic hot sauce on a bayou island made of salt.

A swamp and garden tour featuring local wildlife and exotic botanical specimens from around the world.

Legend says a primate-like cryptid prowls this otherworldy sliver of the Louisiana bayou.

A historic Civil War estate-turned-museum looks back on the Confederate States of America.

A local landmark with generations of spraypainted messages, and more being added each day.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

Once the primary source of ice in this region during the mid-20th century.