There is a Belgian town, where you can find unusual industrial remains: Two huge boxes of stonewall, windowless and gloomy, uprising to a height of at least five stroies.
It was a brick manufacture, build in a special way. The half of the building was an open shaft, where the smoke and Damp from the burning and drying chambers in the ground level could exhaust.
Since it closed down, in this shaft is a miniature jungle growing, a little enclosed biotope.
Big ivy stems.