Potasas de Navarra y la fiesta de Santa Bárbara Historical milestone · Beriáin, Comarca de Pamplona, Navarra Image of Beriáin, not of the place itself. The new district of Beriáin grew from the 1960s around Potasas de Navarra (PDN), a mining and chemical company that at its peak employed some 2,000 workers and built schools, housing and medical services for them. On 4 December, the feast of Santa Bárbara, patron saint of miners, the town holds processions in traditional mining costume. 4 de diciembre Photo: Zarateman (CC0) What to see and do in Beriáin