The site is about an hour NE of Wytheville and is an underground limestone (kalksteen) mine. Limestone is mainly used as raw material for the production of cement. We will be working on 13th level at about 250m depth. The tunnes are really big, about 6m high x 12m wide, and instead of a shaft with a hoist there is a spiralling access ramp that you can drive down, even with a fair sized truck.