Zeppelins and other types of ballonns are common in solarpunk imagery. They are atmospheric, silent, and low energy objects.
I was deeply impressed by Herzog’s “White diamond”, which depicted a dream of a pilot to float above Amazon jungle without any disturbance.
Airships are somewhat architectural, too. Their heir huge, somewhat static volume and space is built on air instead of ground. Just look at Cloud CH4.
Just recently Mat Ferrell talked about the possible comeback of Airships in full seriousness.
So I decided put this typology on radar, and of course, a dedicated tag.