Over the centuries, Tyr has been racked by conflagration, famine, sandstorm, pestilence, war, and the wrath of the Dragon. Each time the city-state suffered a tragedy, Kalak ordered it rebuilt. More than two thousand years of such activity means that several layers of ancient ruins lie beneath Tyr, with entrances to Under-Tyr scattered throughout the city. The Warrens contain many entrances, about half of which are sealed, but hidden passages exist in nearly every district. Those who own a shop or structure that has an entrance to Under-Tyr might allow explorers to use the route for a fee and a pledge of silence.
As explorers follow one of the tunnels beneath Tyr, they cross interconnected sunken streets, ancient sewers, lightless courtyards, dizzying stairs, fallen towers, lost catacombs, and echoing cellars. Halfcrumbled businesses, residences, and shrines to forgotten gods abound. Within this subterranean realm lurk creatures that have adapted to the darkness, undead, latent magic wards, and criminal elements using shortcuts and lairs that are unlikely to be discovered by the Tyrian Guard. King Tithian has declared Under-Tyr off limits to citizens—not to protect would-be explorers, but to avoid arousing unknown magic, traps, or monsters that lie slumbering.
Under-Tyr consists of hundreds of distinct pockets beneath the present-day city-state, some of which are not connected to one another. The major routes include a myriad of intersections and smaller passages that lead to mazes of dark corridors, echoing chambers, and dank cavities. The largest interconnected regions beneath Tyr are the Sorrows, the Elven River, the Belly of the Noble, Tembo’s Teeth, the Crawl, the Road of Crypts, and Night Dragon Way.