"We Seceded Where Others Failed."

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

Once America's tallest structure, now a Baltimore landmark.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

Georgia's first brewery is also one of its oldest surviving buildings.

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

A hobby born from insomnia has turned into a hangar full of objects that have been be-buttoned by the Button King.

North Central Florida's largest flea market and a weekend roadtripper's dream.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

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

The culprit who accidentally lit this 3,500-year-old tree on fire stated "I can't believe I burned down a tree older than Jesus."

A mysterious castle built as a monument to lost love.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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