Velsen is a district in Saarbrücken. It is in the west. Velsen has a special mine. It is called the Velsen Adventure Mine. The mine was a training mine. It closed in 2011 - . A group called Erlebnisbergwerk Velsen e.V. took over the mine. They opened it again for visitors.
The adventure mine is special. It is not just a museum. You can see how mining works. You can see machines that still work. The mine has 800 meters of tunnels on 3 levels. The machines are still working. You can see conveyor belts, loading machines and drilling equipment. Everything works like it did when miners worked here. The machines use water power, air power or electricity.
