Valladolid is located at roughly 735 metres above sea level, at the centre of the Meseta Norte, the plateau drained by the Duero river basin covering a major part of the Northwest of the Iberian Peninsula.The primitive urban core was built ex novo in the 11th century on a small elevation near the confluence of the Esgueva with the Pisuerga, on the left-bank of the later river.
https://en.wikipedia.org/wiki/Valladolid

