A coal pile.

This photograph was taken by Erland Lewin sometime between Aug 01, 1995 and Sep 01, 1996.

Traditional charcoal production deep in the Dalecarlia (Dalarna) forest in Sweden. Wood is piled in a heap, and covered with earth, and made to burn very slowly to convert it into charcoal. The pile must be constantly tended so it won't burn up or go out. The photo was taken with a long exposure time.