Drone Photogrammetry of Cerro del Oro in Granada. This mine has been mined by both the Romans and the Arabs, being one of the most prolific gold mines of the peninsula.
It was opened again during the XIX by a French businessman, although it was closed soon after due to the disinterest of said person.
Several studies have been done on the reopening of the mine, but they have all determined that the biggest ores are found beneath the Alhambra.