That’s a radome. They started popping up in Britain in the 1950s, and by the Seventies were prime Weird Britain landmarks. Always in bleak, remote places, always looking like bubbles of eerie retro science-fiction dropped on the landscape. They’re used for radio intelligence gathering. Rovers from THE PRISONER, paused on the moorland and sniffing the air for microwaves.
– W
Journal of a Cosmic Anthropologist 