Mina de Sotiel Coronada Monument · Calañas, El Andévalo, Huelva Former mining operation with remains of a Roman-era silver smelter; after decades of abandonment it was reactivated in 2015 by the company Matsa. 2015 (reactivación) Photo: FJavier GómezL (CC BY-SA 4.0) What to see and do in Calañas