Pop quiz: What marketing idea put Rock City Gardens on the map?

You’ve heard of Rock City Gardens — but do you know what Depression-era marketing idea helped make the panoramic attraction an American icon?

The answer: “See Rock City” Barns.

“See Rock City” is a slogan painted atop barns across the country — a clever eye-catching idea hatched to increase visitors when the garden + rock-formation marvel opened in the 1930s.

90 years later, efforts are underway to restore several of the roadside barns, with rooftops in Alabama, Georgia, and Tennessee already freshly painted.

See how else they’re celebrating 90 years.