Ada Kaleh (Romanian pronunciation: [ˈada kaˈle] from Turkish: Adakale meaning "Island Fortress", Hungarian: Újorsova or Ada Kaleh, Serbian and Bulgarian: Адакале / Adakale) was a small island on the Danube populated mostly by Turks that was submerged during the construction of the Iron Gates hydroelectric plant in 1970. The island was about 3 km downstream from Orşova and measured 1.75 by 0.4–0.5 km.