I’d indeed read a while back about the Elmo Lincoln “Tarzan” film (from back around 1918) being shot somewhere outside the Houma area. Surprised me. But apparently they found some appropriately ‘jungle-like’ terrain in the vicinity.
There was also a short-lived, and apparently none-to-successful attempt to start up a company to shoot some early filmed tv-series in the New Orleans area, in the early-to-mid-50s. Two series resulted, “N.O.P.D.” and “The Tracer.” Made for the syndication market, but I don’t think they circulated much or lasted long.
The Johnny Weismuller "Tarzans" were shot on the Myakka River in Florida, near the Gulf Coast between Venice and Port Charlotte.