Caption on back: "Florida's Weeki Wachee Spring, with its new, enlarged underwater show, has been seen by millions who have said, 'It's the world's greatest underwater spectacle. It's guaranteed entertainment!'"1
Publishers: Florida Natural Color of Miami and Koppel Color Cards of Hawthorne, New Jersey
Used: Yes. It was postmarked on November 14, 1962, in Venice, Florida, and mailed to Mount Pleasant, Pennsylvania.
Comments: Weeki Wachee Springs is still going strong (although its website does take quite a while to load). It opened in 1947, with swimmer/promoter/educator/coach Newton A. Perry spearheading its development. Some of its popularity was spurred during a period, starting in 1958, when the American Broadcasting Company owned the attraction. In 2008, Weeki Wachee Springs became a Florida state park.
Papergreat's Chris Otto is spending June 5, 2013, blogging as many vintage postcards as possible. It's "The Fast and Furious" (and hopefully also "The Fun") for ephemera lovers and deltiologists. Read all of the posts starting here.
1. It's not clear if all of the millions of people said that exact quote. That would seem unlikely.