A graveyard of bathyspheres and diving bells paints a weirdly accurate account of ocean exploration's rickety history.

A humid oasis combines recreation with exploration in a unique underwater cavern.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

Built following the War of 1812, this fort has withstood hurricanes for centuries.

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

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

One of the longest water bridges in the world was built over a supposedly haunted swamp in Louisiana.

The LSU mascot lived on the college campus in one of the most impressive tiger habitats in the country.

This two-room shotgun shack in Tupelo is the birthplace of a King.

Elvis's own personal tropical hideaway.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

Walk the whole Mississippi River!

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

An enormous natural sandstone bridge in Kentucky.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

This structure among the trees was the result of divine inspiration.

Enormous lake at the bottom of a unique cave system.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

Some North Carolina Cherokee have been keeping their history alive for decades with a single play.

Over 20,000 sets of spice shakers reveal the surprisingly telling history of our most basic spices.

Mile-long cave system near Great Smoky Mountains.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.