Rookhope Smelt Mill 

Rookhope Arch in County Durham currently stands alone in a field.
Originally this arch was one in a line of six, built to support a horizontally running chimney which extended for a mile and a half up the adjacent hillside.
The chimney carried lead fumes from the old lead smelting works which occupied the site from the 1880s as seen illustrated here below,

The very same 21st century view can be compared at the bottom of the page.