This dramatic rail curve was once the target of a failed Nazi attack.

Memorializing an American tragedy of massive proportions.

Steepest flood safety railway in the entire world.

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

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

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

An ode to "The Queen of Appalachia."

A glimpse at Walt Disney's vision for a "community of tomorrow," in miniature.

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

Located inside a former bread factory, this museum explores a century of transportation history through innovations that were extraordinary or failures—sometimes both.