Petra is the south island, whereas Amnos is the north island. Petra is mostly uninhabited, untamed, and unexplored. It has vast jungles, high mountains, and arid deserts. The ancient empire of Viridis once controlled the northern third of the island; many ruins remain.
Petra is not completely devoid of intelligent inhabitants. Drow and yuan-ti battle for dominance of the southern jungles; a few scattered tribes of goliaths can be found in the rugged mountains; and legend tells of ancient dragons that make their homes in the most remote parts of the island.