Valley of the Nine (Elder Speech: Dol Naev'de) was once a valley in Toussaint when the elves still lived in the area.
Sometime later, the Sansretour River flooded the valley, wiping it off the map and making it part of the Sansretour Marsh. This flooding hid an ancient elven ruin at its depths, though rumors would continue to circulate centuries later regarding them, particularly among those seeking out treasure.