Block of concrete, Springfield Mill site © Jim Barton cc-by-sa/2.0 :: Geograph Britain and Ireland
Woodland at the site of a demolished paper mill, now returning to nature with paths next to the North Esk at Polton near Bonnyrigg. The block was substantial, about 2m square.
United Kingdom Springfield Mill North Esk Automatic Clusters Springfield Paper Mill Demolished Paper Mill
Source: geograph.org.uk