This mine was the basis of Parral’s economy for centuries after it opened in 1629, producing mainly silver but also gold, copper, zinc and lead. Today, it’s one of the world’s oldest mines still in operation. You can drop down 87m in an original elevator to the second of its 25 levels (the 23 below are now flooded) and walk 250m along a tunnel hand-cut around 1820, with historical displays on mining methods used throughout La Prieta’s history.