Retortillo Spa Activity · Retortillo, Ciudad Rodrigo, Salamanca Image of Retortillo, not of the place itself. Five kilometres from the village, sulphurated-sodic hyperthermal waters rise from the bed of the Yeltes at a constant 48.5 degrees, with a flow of 212 litres per minute. They were declared of public utility in 1905 and the Romans had already left a votive altar here. Photo: Manuel Gómez-Moreno (Public domain) What to see and do in Retortillo