Tarzan and the Valley of Gold (1966)

In Central America, a little native boy, Ramel, is abducted by Vinaro, a madman who believes the child to be the sole link to a lost Aztec city of gold. Vinaro uses one of his diabolical explosive mechanisms to eliminate police and army officials; and the legendary Tarzan is flown in to help locate the jungle city, rescue the boy, and bring Vinaro to justice.