Marvelous
From James River Branch via Hackaday.
Cheating slightly, but what the hey. It could go with these little house-rings:
From Philippe Tournaire, who has loads of them. This came via not only Notcot.org, but this site : http://ifitshipitshere.blogspot.com who’s page-height clocks in at a rather impressive 252604px… which on my screen-resolution of 42px a cm, makes it about 60 metres tall.
About 20 stories high in other words… almost exactly the same length as Firefly, off Firefly, according to this http://www.merzo.net/