Same Story, Different Cover: Here the Sulphur River flows rising when the storm cloud blows

L: Tales to Astonish #11 (September 1960), art by Jack Kirby and Dick Ayers
R: Chamber of Chills #18 (September 1975), reprinting "I Found Monstrom! The Dweller in the Black Swamp!" from Tales to Astonish #11, art by Ron Wilson and Mike Esposito
(Click picture to Ted Sallisize)

(And the cover's also mildly reworked on Fear #1 (November 1970):