Barracel Nature · A Merca, Terra de Celanova, Ourense Image of A Merca, not of the place itself. At 856 metres it is the highest point in the concello, well above the 400 to 500 metres at which most of the district lies, where the climate already marks the transition between the oceanic and the Mediterranean. Photo: Dario Alvarez (CC BY 2.0) What to see and do in A Merca