The walls of the iconic dome are hollow and have a secret stairway.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

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

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

This historic train station has been converted to a locomotive themed hotel.

Elvis's own personal tropical hideaway.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Walk the whole Mississippi River!

This replica of the Greek structure is in the heart of Nashville.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

Once the most flame resistant building in the country, the South Carolina Historical Society building was almost burnt down in a fire.

A quirky Poe-themed joint on an island keen to celebrate its overlooked connection to the famous writer.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

One of the oldest living oak trees in the Southeast.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

The highway's southernmost spot is a beloved local attraction.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

St. Augustine's record-setting narrow street was designed to protect against pirates.

The island residents are known for taking their quirky sense of humor with them to the grave.