Between Arta and Tzoumerka mountain range, lies Lake Pournari. It is an artificial lake, created by the construction of a dam on Arachthos river, near the settlement of Pournari after which both have been named. The dam is the second largest dam in Greece - measuring 107 meters high, 580 meters long and 450 meters wide - and holds the waters of Arachthos thus also controlling the flow of the river. The lake is "home" for many varieties of fish such as carp, brian, wild trout and eels and also provides shelter for many birds such as mallards, kingfishers and little ringed plovers.