Stretches over a plain of some 10,000 stremmata (about 2500 acres) towards the north of the Mesis region. Long ago it was a lake, which was subsequently drained, and today a great network of irrigation ditches and canals carries away rainwater absorbed by the rich soil, by way of the Ropa, or Ermones, River. Parts of the valley have been developed for tourism, and there is a golf course and horse riding while agriculture is essentially non-existent. With a lake close by to the east, with its river flowing out to the sea at Ermones Bay, the valley has become an important wetlands habitat, home of a multitude of birds, reptiles, amphibians and fish. On the low hills which completely surround the valley, agricultural villages have been established, such as Kanakades, Marmaro, Giannades, Tembloni and Vassilika.