Inicio de la explotación minera moderna de Calañas Historical milestone · Calañas, El Andévalo, Huelva Image of Calañas, not of the place itself. In 1853 the French engineer Ernest Deligny began modern mining operations in the municipality of Calañas, which went on to exceed 12,700 inhabitants in 1910 before the later mining crisis. 1853 Photo: 19Tarrestnom65 (CC BY-SA 4.0) What to see and do in Calañas