ALTWASSER, a town of Germany, in the Prussian province of Silesia, 43 M. by rail S.W. from Breslau, and 3 M. N. from Waldenburg. It has factories for glass, porcelain, machinery, cotton-spinning, iron-foundries and coal-mines. Pop. (1900) 12,144. ALTYN-TAGH, or AsTYN-TAGx, one of the chief constituent ranges of the Kuen-lun (q.v.) in Central Asia, separating Tibet from east Turkestan and the Desert of Gobi.