Man-made structures on the Lancashire moors

I don't know what these little brick structures are - they're on the moors between Blackstone Edge and Lighthazzles reservoirs, above Littleborough. I'm sure this will divide opinion, but I really like their colours and shapes - their state of disrepair also appeals to my liking for 'falling-down' buildings. I also like that this picture includes the pylons - more man-made structures that line our moors and divide opinion.

Camera/lens settings: ISO 100, f/11, 1/60s, 18mm, hand held.