The Proviadrys Valley (IPA: /pɹəˈvaɪədɹɪs/) region is a highly-fertile area of eastern Epiros around the Proviadrys River. In its narrower sense, the term refers to an expansive swath of excellent agricultural and pastoral country on either side of the river between Koniak Falls and Galaznero Marsh, but more broadly it defines the borders of the former Pioligian province of the same name. The province and the river valley contained within it are now part of Anvero.