Vosvozis is a river in Thrace. With its springs located in the mountain range of Eastern Rhodope and the foothills of Mount Papiki, Vosvozis flows towards the north side of Lake Ismarida. It has a total length of about 53 kilometers. At the point where the river flows to Ismarida, the vegetation is rich with grey alders, willows, white poplars, field elms, and ashes. Compared to the past, the waters of the river have been significantly degraded in terms of both quality and quantity, especially in summer.