Since it formed millions of years ago, this cave system has been a sacred burial ground, a Prohibition-era speakeasy, and the center of an amusement park.

An autonomous oak in Alabama.

Alabama has a fiberglass Stonehenge. With apologies to Spinal Tap, this one is full-size.

A wealth of local folk art, antiques, and curios, without ever leaving your car.

A former taxidermist has turned his old shop into a folk art mecca.

148 feet long and in the middle of a verdant forest.

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

One person's lost luggage is another person's treasure.

Underneath this water pump, Annie Sullivan helped Keller speak her first words.

Victorian-era Egyptomania left its mark on this Nashville landmark.

This popular park is home to a sea serpent sculpture that now overshadows the twisted history of its creation.

An idyllic mineral hot springs facility with a more-than checkered past.

A 17th-century bezoar, dirt from an infamous site, and other curios decorate this unusual bar.

A 315-foot spire jutting out from the Blue Ridge Mountains makes for breathtaking views.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

Huge masonic hall in Philadelphia with lavishly themed rooms.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Where America's first doomsday cult awaited the end of the world.

These mystical miniature houses bring a touch of magic to the New Jersey woods.

Featuring the the longest lift span of any vertical-lift bridge in the world.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

The collection is exhibited in a Staten Island building modeled on traditional Himalayan architecture.

A town trapped in time - 1958 to be exact.