The two-faced conical sundial Monument · San Miguel de Corneja, El Barco de Ávila - Piedrahíta, Ávila A rare sundial of conical form and double face, with a T-shaped gnomon, is preserved in the village. Its geometry sets it apart from the flat dials usual in the rural architecture of the Corneja valley. Photo: Karuchi (CC BY-SA 4.0) What to see and do in San Miguel de Corneja