The cast never actually left England, with virtually all of their work done on studio sound stage sets, interspersed with African wildlife and scenery footage obtained by Miki Carter.
Filmed in 1956 in both a CinemaScope 2.35:1 version and a 1.37:1 "flat" version. The UK theatrical release in the summer of 1958 was of the CinemaScope version, but subsequent television showings in the UK have always been of the "flat" version, as is the Warner Archive DVD-R release.
When Tarzan is climbing up the steep hill over which the natives are, there is a man in the bushes who was squatting and then stands , he has light trousers, absolutely nothing to do with the story.