Minas de Pozo Rico Historical milestone · Guadalcanal, Sierra Norte, Seville Image of Guadalcanal, not of the place itself. The Pozo Rico silver mines, opened in 1555 and worked among others by the Fugger family, reached a depth of 198 meters in 1568 and housed Europe's first industrial-scale amalgamation facility. 1555 (apertura); 1568 (198 metros de profundidad) Photo: HabibiAyllón (CC BY-SA 3.0) What to see and do in Guadalcanal