The salt works at their peak Historical milestone · Poza de la Sal, La Bureba, Burgos Worked since Roman times, in 1845 the salt pans brought together thirty wells, twenty kilometres of brine channels and more than two thousand evaporation beds, with a capacity for eleven million kilos of salt a year. 1845 Photo: The original uploader was Jsanchezes at Spanish Wikipedia. (CC BY-SA 3.0) What to see and do in Poza de la Sal