The Chełm Chalk Tunnels (in Polish Chełmskie podziemia kredowe) are a system of tunnels dug into the chalk under the city of Chełm in eastern Poland. The tunnelling began in the Middle Ages for chalk mining and was discontinued in the 19th century. The tunnels also served Chełm's inhabitants as shelters during raids, wars and pillage. The system is now open solely for tourists. In total, the network of tunnels stretches for around 15 kilometres (9 miles). The Chełm Chalk Tunnels are unique in Europe and even the world. Chełm is a small town, one of the oldest in the Lublin region of Poland, in the east of the country. The chalk tunnels came into being as a result of the exploitation of rich chalk deposits which lie under the surface. More information...
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