For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

This strange example of the Egyptian Revival architecture trend now holds Mardi Gras floats.

This colorful New Orleans bookstore features rare and used titles, with a specialty in Cajun fare.

This abandoned Civil War fortress is slowly being swallowed by the waters of Lake Borgne.

Once defending the city of New Orleans from invasion by sea, this fort faces an uncertain future.

The crumbling remains of a 19th century fortess.

Despite the ever pressing encroachment of urban sprawl this grand New Orleans manse still stands.

A museum and shop on Bourbon Street located in the French Quarter.

The final resting place of New Orleans' most famous voodoo priestess.

The Man In Black grew up in a large agrarian community established by the federal government in the Great Depression.

Twenty-year effort to raise a castle using tools and techniques from the 13th century is now abandoned in the Arkansas woods.

The Old Mill shown in the opening credits of “Gone With the Wind” is actually fairly new, and was never a mill at all.

The Ozarks' strangest dwelling.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

Another in a long tradition of legends regarding infernal seats.

The maximum security facility was once thought to have "the bloodiest 47 acres in America."

This historic cliffside mansion uses a natural cave for air conditioning.

A mysterious light of unknown origin on the backroads of Missouri.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.