Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

A Nessie-like monster supposedly lurks in this lake.

A historic covered bridge, only one of two remaining in North Carolina.

The largest self-built castle in the U.S., six decades in the making.

A mysterious castle built as a monument to lost love.

This church houses the “incorrupt” body of its founding Bishop.

Once one of the largest producers of pig iron in the world.

An innovative attempt to break a siege in the American Civil War still scars the earth today.

A self-explanatory attraction allows fans to respectfully remember and honor a comedy legend.

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

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

Bananas are often left for the first monkey America ever recovered alive after being launched into space.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

This largely forgotten piece of Cold War history stands hidden in the woods just north of the Mississippi Gulf Coast.

The fine fabric handwoven at Biltmore Industries was once coveted around the world.

A mysterious pillar in an ancient burial chamber is said to predict how long you have to live.

Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.

A beautiful oddities shop crammed with strange and morbid curiosities.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

Taste the white whiskey that the United States' first president once distilled and enjoyed.