A World War II anti-aircraft gun emplacement on the Crafrod Marshes near Slade Green, London. This is one of four at this location. The command post can be seen here: https://skfb.ly/o9OMT
EDOBID: e00041
https://www.heritagegateway.org.uk/Gateway/Results_Single.aspx?uid=1413703&resourceID=19191
Ground level capture of same site by @peterbarry: https://skfb.ly/o9WTs
Photos taken in April 2022 with a DJI Mini 2 and processed in Reality Capture.