All of Chicago's wood-paved streets are long gone but two alleys remain.

Nonprofit art center that promotes outsider, intuitive, and self-taught art.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This grand gothic brewery has been pumping out suds for over a hundred years.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This abandoned lighthouse looks like a rusting oil rig, but has managed to survive a number of storms.

From failed port town to Civil War fort, the ruins of this former defense saw their finest day in the television age.

Garden dedicated to native carnivorous plants and site of huge flytrap heist.

Traditional Appalachian dances such as the Georgia Rang Tang and the Shoo-Fly Swing are kept alive at this weekly event.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

A retired tobacco farmer's pet project turned into a sturdy miniature city.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

This research center for rare prosimians is studying how they sleep to help prolong human life.

Hop on the train and tour an elaborate miniature town made completely of junk (including the train).

The highest point in Virginia can only be reached by passing through ponies and flowers.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

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

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

This abandoned amusement park was built on a site with a dark history.

This multi-story wooden waterpark offers homemade thrills.