[1] Tarzan returns to Opar, the source of the gold where a lost colony of fabled Atlantis is located, in order to make good on some financial reverses he has recently suffered.

While Atlantis itself sank beneath the waves thousands of years ago, the workers of Opar continued to mine all of the gold, which means there is a rather huge stockpile but which is now lost to the memory of the Oparians and only Tarzan knows its secret location.

A greedy, outlawed Belgian army officer, Albert Werper, in the employ of a criminal Arab, secretly follows Tarzan to Opar.

159-161, dated May–September 1967 (script by Gaylord DuBois, art by Russ Manning), and Marvel in Tarzan, Lord of the Jungle nos.

Talinum paniculatum is a native plant from West Indies and Central America and has common names of Fameflower and Jewels-of-Opar.