I Saw these while out and about today, they were quite large, so I've taken them from this point of view and included the houses in the background to try to include some sense of size. They've been dug up on a disused petrol station forecourt, so I presume they were fuel tanks.
Wow, well spotted. I have often wondered what the fuel tanks looked like at petrol stations. I would imagine that the ground around them would be contaminated.
Ian
I like all the textures and shapes in this.