This freshwater spring fills with 10,000 gallons of water per minute.

This 19th-century hotel and spa hosted famous guests like like the Vanderbilt family, William Waldorf Astor, Helen Keller, and Jay Gould.

This 36-foot-tall bronze Lady Liberty holds a real flaming torch.

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

Once a bustling cotton factory, this early 20th-century building is now home to a thriving artspace.

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.

This 1,500-acre development hopes to be the Central Park of the South.

An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

A place to eat for on-the-run agents and espionage enthusiasts.

Perhaps the oldest vine in North America, this sprawling plant helps make a sweet wine.

The perfect place to take a family of giants for a beach vacation.

This nine-story building can be played like an instrument.

This multi-story wooden waterpark offers homemade thrills.

Classy up your Big Mac with bow-tied servers and chandeliers at the world's fanciest McDonald's.

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

A mountaintop space observatory that is certified dark.

In a pedestrian tunnel on North Carolina State’s campus resides an expressive and artistic free-for-all.

This sweet Southern elixir comes from what may be the oldest grape vine in North America.

The world's largest vertical wind tunnel.

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

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

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

This woodland architectural installation acts as a camera obscura for the heavens.

Designed as a place for patients to take in the scenery, this tower has a dark history.