Viannos is one of the most mountainous municipalities of Crete. At the same time, it combines access to the sea, being the town with the longest coastline on the south coast (15 km). Due to abundant water resources, and the composition of rocks, Viannos has numerous water sources whereas the most important are located in Ano Viannos, Kefalovrysi and Symi. The geography of the area has determined the economic activities of the inhabitants. Historically the main occupation has been agriculture, especially the cultivation of olives, a few fruit trees and vegetables, whereas livestock and beekeeping have been a source of supplemental income. Today, the oil of Viano has been established as a geographical designation of origin, while other well known products are carobs, dairy products and the bananas of Arvi that thrive throughout the year thanks to the ideal climatic conditions of the area.