*Something straight outta madmax*
AS you now know they are filled with gas your observation now comes under the "many a true word spoken in jest" category.
For full post apocalyptic view [here](https://old.reddit.com/r/glasgow/comments/96o45u/103_day_single_continuous_exposure_taken_with_a/) is a beer can pin hole camera that someone set up and left for a hundred days of the gasometers.
(full credit to u/Hoyerman68 for the image) |