Mushrooms and truffle of Els Ports Food and drink · Arnes, Terra Alta, Tarragona Image of Arnes, not of the place itself. The pine and holm oak woods of the massif give an autumn harvest of rovellons, camagrocs and black winter truffle. The gathering is regulated and supplies the restaurants of the villages at the foot of the sierra during the season. Photo: Jorge Franganillo (CC BY 3.0) What to see and do in Arnes