International Black Truffle Fair Activity · Sarrión, Gúdar-Javalambre, Teruel Image of Sarrión, not of the place itself. Sarrión hosts each winter an international fair devoted to the black truffle that brings together truffle growers, buyers and cooks. The comarca concentrates the largest area of truffle plantations in Europe and sets the reference price of the product. Photo: Juan Emilio Prades Bel (CC BY 4.0) What to see and do in Sarrión