Nulles Main Festival Activity · Nulles, Alt Camp, Tarragona Image of Nulles, not of the place itself. The fiesta mayor of Nulles is celebrated in a town that produces cava and white wine from the macabeo, xarel·lo and parellada grape varieties at a wine cooperative founded in the early 20th century, with warehouses featuring parabolic arches in Modernist style. Photo: Amadalvarez (CC BY-SA 3.0) What to see and do in Nulles