So important in the XVII-XIX centuries. These are monumental stone buildings, wells dug in the mountains, reinforced and covered in some cases, which served the speculative interests of the ice merchants. The nevaters(the ones in charge of the fridges) were day laborers from Salem who collected and compacted the snow of the winter and, when the summer arrived, they took it to sell in Xàtivathe Ribera de Júcar. Behind them there used to be some wealthy peasants of the town,some foreign capitalist, who paid the wages of collecting the snow and organized the distribution of the product. In terms of Salem, six wellscaves were formerly known, among well-worked refrigerators and simple holes: the Castellet (or the Barcella), the Pajar, the Frontó (or Miquel 'de Peronés'), the Castellón road, the Camino del Puerto (or uncle Pepe 'Clara') and the pit of the plan of the Sima (or uncle Cinto). Some of them are filled. The rest have been measured, photographed and carefully cataloged by experts. The best known and visited are the large refrigerators of Castillete (or Barcella) and Pajar.