The Worlds Hidden Beyond Tarzan’s Jungle

The Tarzan universe created by Edgar Rice Burroughs is far larger, stranger and more fantastical than the jungle adventure most audiences associate with the character, and nowhere does that become clearer than in the novels that carry Tarzan beyond familiar African landscapes into hidden valleys, prehistoric worlds, isolated civilizations and environments governed by rules radically different from those of ordinary human society. By the time Burroughs reaches Tarzan the Terrible, the mythology has already expanded into Pal-ul-don, a primeval land cut off behind formidable natural barriers, populated by warring humanoid societies and creatures such as the reptilian gryf; a few books later, Tarzan and the Ant Men introduces isolated peoples of dramatically different scale and even a scientific process through which Tarzan himself is reduced to the size of the diminutive civilization he encounters. The progression is important because it demonstrates that Burroughs never conceived Tarzan as a hero permanently trapped inside a single narrative formula. The jungle was his origin, but the deeper structural principle of the series was exploration: Tarzan could enter environments whose assumptions differed from anything he had previously known because his defining capability was not mastery of one place but the capacity to read unfamiliar worlds without surrendering himself to them.

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That expansion reaches an extraordinary level in Tarzan at the Earth’s Core, where Burroughs crosses Tarzan directly into Pellucidar, the prehistoric inner world from another of his major fictional series. Tarzan enters a realm beneath the Earth’s crust where prehistoric animals survive, geography behaves according to unfamiliar rules and even ordinary perceptions of direction and time become unreliable, forcing a protagonist famous for environmental mastery into a world where his accumulated knowledge is suddenly insufficient. The significance of this is much greater than the novelty of sending Tarzan somewhere unexpected, because Burroughs is repeatedly testing the same psychological question at increasing levels of difficulty: what remains of a man’s identity when the environment that once confirmed his competence no longer behaves according to the patterns he understands? Tarzan begins life by discovering that he is different from the world around him, later learns to move between jungle and civilization, then gradually encounters hidden societies and impossible geographies that make even those earlier divisions appear narrow. The mythology therefore grows outward while remaining connected to the character’s deepest internal structure, and that is precisely why its more fantastical elements can feel surprisingly coherent when taken seriously.

To understand why the lost worlds of Tarzan matter to the possibility of a modern remake or cinematic franchise, we therefore have to stop treating Pal-ul-don, the Ant Men, Pellucidar and the other strange environments of the later books as eccentric digressions from the “real” Tarzan story and recognize that they reveal what the mythology was designed to become. Burroughs keeps placing Tarzan beyond the edge of the known map because the character becomes most revealing when certainty disappears, and each new world strips away another assumption about what he already understands. The result is a source mythology with an extraordinary capacity for escalation: an intimate origin story can become an aristocratic drama, an aristocratic drama can expand into espionage, African adventure can open into Opar, Opar can lead toward lost-world fantasy, and eventually Tarzan can enter Pellucidar itself without the protagonist ceasing to be psychologically recognizable. What looks from the outside like an old-fashioned jungle property therefore contains the architecture of something modern cinema spends enormous resources trying to manufacture from scratch—a world capable of expanding in scale while allowing character, rather than spectacle alone, to remain the connective tissue.