The jagged peaks of the Wailing Spire stretched endlessly into the horizon. Their blackened stone served as a reminder of the chaotic energies that had once shaped the land during a period of turmoil.
This forsaken region, where the boundary between realms had grown thin, now housed the previously sealed one of the three major Underworld Realm passageways which was named after the place itself. The Wailing Tunnel.
It was right inside a cavern carved from one of the stony mountains that comprised the Wailing Spire.
Originally, it was properly sealed that even if an Underworld Cultivator or two managed to slip through, they would easily be marked by the ones standing guard there.