Run through the Jungle
The harbor of Port Nyranzaru was designed with defense as its first priority, because pirates roam the sea north of Chult. Protecting against threats from the interior is just as important, and thus a high stockade wall of stone fronts the jungle, pierced by three well-guarded gates.
Amn owns and controls all activity in Port Nyranzaru. Taxes are high, but those lucky enough to be
employed by one of the major trading companies live in relative safety inside the walls of this ultimate frontier city. Those not affiliated with any of the trading companies are forced to live in the expansive shantytown beyond the wall. They survive as best they can, dealing constantly with disease and threats from the Jungle.