Wikipedia
Ambassel is one of the woredas of the Amhara Region in Ethiopia, and an amba, or mountain fortress, located in the woreda; the woreda is named for this feature. Located in the Debub Wollo Zone, Ambassel woreda is bordered on the west by the Bashilo which separates it from Tenta, on the north by the Semien Wollo Zone, on the southeast by the Mille River which separates it from Tehuledere, and on the south by Kutaber; the Walano, a tributary of the Bashilo, defines most of its southern border. Its largest town is Wuchale.
Elevations in this woreda range from 1200 to 3200 meters above sea level; the divide between the drainage areas of the Nile and the Awash runs through the middle of Ambassel. Rivers include the Waha Titu. Notable landmarks include Amba Geshen, where the medieval Emperors of Ethiopia would confine their male relatives to keep them from threatening his power. Ambassel has proven deposits of coal near Wuchale, which were exploited during the Italian occupation.