A quarter-mile past the nominal outskirts of town, a great stone arch rises over the dusty trade road. Thought to have marked the start of some great thoroughfare of the ancient city, it is the only structure beyond the docks to have withstood arcane conflict and the ravages of time.
Travelers who approach Ardhmen along the road by night sometimes tell of hearing faint sound as they draw close. From the darkness ahead comes the distant noise of a bustling port city -- ships' bells, uncounted voices, the clack of wagon wheels, and the roar of beasts exotic and mundane. Invariably, the phantom noise fades away when any creature passes within 100 feet of the arch. However, it is well known in Ardhmen that characters who spend a full night within that range receive a +10 circumstance bonus on a single Knowledge (local Syrkarn) or bardic knowledge check made at dawn the next day.
Adventure Hooks: Though PCs can make use of the whispering arch as they seek information helpful to the mission at hand, the old magic here sometimes has a mind of its own. Characters camping within sight of the arch or passing through it might be suddenly stricken with visions of the old city of Irsthaana. Such visions might provide the party with important clues to the location of an ancient relic, or inspire contact with a current-day descendant of some figure of Sarlona's distant past.