"The Neolithic flint mines at Spiennes, covering more than 100 ha, are the largest and earliest concentration of ancient mines in Europe. They are also remarkable for the diversity of technological solutions used for extraction and for the fact that they are directly linked to a settlement of the same period." -http://whc.unesco.org
Hi Gerda! Thank you so much for increasing my UNESCO collection from your country! Looking forward to hear the stories of your visit in this site when it re-opens next year!