The Tera plain and the slates Nature · Cernadilla, La Carballeda, Zamora Image of Cernadilla, not of the place itself. The municipal district extends flat along the left bank of the Tera over dark slates crossed by little veins of quartz, with oak as the dominant vegetation and the A-52 motorway crossing it from side to side. Photo: Estevoaei (CC BY-SA 4.0) What to see and do in Cernadilla