No one is sure why this mysterious tradition started.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

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

These craggy limestone outcrops offer a glimpse at a unique piece of Florida geology.

This picturesque ghost town is located on the banks of the Suwannee River.

View rare birds and interact with lemurs at this nonprofit run entirely by volunteers.

The ruins of a creative scholar's fantastical unfinished sanctuary act as his massive gravestone.

The only Florida state park with publicly accessible caves.

Religion and personal struggle gave birth to this collection of concrete angels.

Pirates had to be ousted from the land where this now ruined Louisiana fortress was built.

This museum chronicles the history of a leprosy quarantine hospital that then became a refuge.

This eight-mile stretch of road gets its name from a local legend about a lost soul searching for his head.

Tucked away down this Baytown alley exists a one-of-a-kind art exhibit of technicolor umbrellas.

A decaying concrete oil tanker served as a disposal location for bootleg hootch.

Nestled in the heart of a Texas town is a dreamy secret garden dating back to the 1940s.

Located in the place where the Columbia space shuttle came down, a museum-memorial that is both touching and informative.

A 19th century family buried their dead among the pines, beneath gravestones styled after ancient Scottish cairns.

The 19th-century ruins hide deep in an overgrown forest.

Scale replica of China's ancient terracotta tomb warriors and Forbidden City are the side project of an eccentric millionaire.

A medieval castle in the middle of rural Texas.

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

It specializes in outsider art and artifacts of secret societies.

This family cemetery is a reminder of a smallpox outbreak in late-19th-century Texas.

"Dallas’s pretty much only carnivorous plant gallery."