In the reserve there are three old remnants of charcoal kiln. One of them was used until the 20th century.The explanation may be the proximity to the mill of Karlsdals, that was depending from the charcoal for its business and was up-and-runnign until 1932.
For more information: http://www.karlskoga.se/Uppleva--gora/Gora/Narnatur-och-naturreservat/Naturreservat/Alvskogen.html
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Länsstyrelsen Örebro Länlansstyrelsen.se/orebro.html