The communal oak and holm oak woods Nature · San Miguel de Corneja, El Barco de Ávila - Piedrahíta, Ávila The district preserves centuries-old oaks and holm oaks sustained by a regime of communal use inherited from the medieval comunidades de villa y tierra, a form of tenure still alive in the Corneja valley. Photo: Karuchi2 (CC BY-SA 4.0) What to see and do in San Miguel de Corneja