1) Mine in Poland 
The flint mining in Krzemionki began about 3900 BC and lasted until about 1600 BC. During Neolithic times the mine was used by members of the Funnelbeaker culture who spread the flint mining area far up to 300 km. The Globular Amphora Culture also used the pits and even more intensely, enlarging the area of exploration to about 500 km. The site is...