The Corneja valley Nature · San Bartolomé de Corneja, El Barco de Ávila - Piedrahíta, Ávila Image of San Bartolomé de Corneja, not of the place itself. The Corneja rises beside the Cerro del Santo, at 2,294 metres, and runs forty kilometres through thirteen municipalities to the Tormes, by then on the boundary with Salamanca. Its basin is around 400 square kilometres. Photo: Xemenendura (CC BY-SA 4.0) What to see and do in San Bartolomé de Corneja