Nature Park of Alvão the moist lands along the riverfront. The Olo River is rich in trout and is populated by the Eurasian otter ("Lutra lutra"). Throughout the region, bird populations are diverse and include nesting pairs of Golden eagles. Mammal populations are marked by the presence of Wild boar ("Sus scrofa"), Roe deer ("Capreolus capreolus"), European badger ("Meles meles"), Granada hare ("Lepus granatensis") and European rabbit ("Oryctolagus cuniculus"). Among reptiles in the area are the Iberian emerald lizard ("Lacerta schreiberi") and the Latastei viper ("Vipera latastei"). No less important to the region is the traditional architecture of the nature park region, especially in
River Meles on its banks. No fewer than six small streams flow into the Gulf of İzmir between the northeastern tip of its outlying waters, where old Smyrna was built, to the city's ancient hilltop castle commanding the inner Gulf's southern shores (Kadifekale today, Pagus and Mount Pagus in ancient times) on the slopes of which, according to tradition, Alexander the Great had the dream of refounding a new Smyrna. Among these, the stream which rises ten miles south of the castle and flows round the base of its mountain had acquired the name of Meles in modern times and kept it