|Image: hammer and chisel, international symbol of mining.|
Mines are artificial voids underground, made in search of valuable ore or minerals.
There are many mines, all over the world, producing any imagineable natural resource. Some are on the surface, like the Big Pit in Utah, USA, called opencast mines. But most are deep inside the earth. Some mines have thousands of years of history, others are very new. Most of the mines are closed today, because their ore is not valuable enough, to expensive to get or exhausted.
Closed mines sometimes become show mines. A tour shows a part of the original mine, machines, ore, the geology and the history of this site.
Closed mines, which are not show mines, are very dangerous! They are much more dangerous than caves, so please, never try to enter one of them!