Replacement of the vine by the hazelnut tree Historical milestone · Alforja, Baix Camp, Tarragona Image of Alforja, not of the place itself. Phylloxera razed at the end of the nineteenth century the vineyards that sustained the economy of the mountain villages. The hazel took their place until it became the dominant crop of the comarca, which today accounts for a good part of the Catalan harvest. siglo XIX Photo: Juan Emilio Prades Bel (CC BY 4.0) What to see and do in Alforja