Karamursel, Turkey AN/FLR-9

The US had a long and important military relationship with Turkey during the Cold War due to its proximity to the Soviet Union. Thus, it is not surprising that there are many relics of that relationship visible from space. One of them is the former FLR-9 antenna site at Karamursel, near Istanbul. Karamursel's location on the Bay of Izmit has resulted in it serving as a base for various navies at least since 1327. (I don't think the US was involved back then.) The US operated a base here for many years, but pulled out for good in 1979 (though the handwriting was on the wall in July, 1975 when the Turkish government demanded an immediate shutdown of the base in response to a US arms embargo). The FLR-9 is long gone, but the circular vegetation patterns continue to mark the location.

FLR-9 site at Karamursel, Turkey [40 42 35N, 29 31 39E]