The Tormes corridor and the Caballeruelo stream Nature · San Lorenzo de Tormes, El Barco de Ávila - Piedrahíta, Ávila Image of San Lorenzo de Tormes, not of the place itself. The 14.5 square kilometres of the municipal district are divided between the valleys of the Tormes and the Caballeruelo stream, with elevations ranging from 970 to 1,320 metres and the route of the N-110 crossing them from side to side. Photo: 19Tarrestnom65 (CC BY-SA 4.0) What to see and do in San Lorenzo de Tormes