The Pichincha volcano culminates at 4776 metres. Quito is located between the high plateau of Turubamba and Rumibamba, which was already inhabited by Indios at the pre-Columbian time. In spite of the foothills of the site, the founders considered that it was possible to create a city there even if its plan were to look like a true chess-board. The city extends on 40 km length and its airport is almost located at the center of the agglomeration.