 It comprises numerous thriving (and sometimes warring) city states and empires, one of which is Opar.Opar is, in fact, far from the most important of these cities.The Opar described in the Tarzan novels is depicted as a "former colony of Atlantis" and this is adhered to by Farmer, though "Atlantis" in this context—the capital of the empire of which Opar is a province—is located on an island in the African inland sea, not in the Atlantic Ocean.