Minas de vanadio de Santa Marta Historical milestone · Santa Marta, Tierra de Barros, Badajoz Between 1870 and 1912 Santa Marta de los Barros was home to one of the largest vanadium mining operations in Europe, a period of mining prosperity that raised its population to nearly 7,000 inhabitants. 1870-1912 Photo: Lolosanagon (CC BY-SA 4.0) What to see and do in Santa Marta