After yesterday’s photograph, I happened to see today on the TV that new archaeological digging is to begin at Caistor St Edmund. The Norfolk Archaeological Trust own the site and have a website with some (not very useful) information on it.
After WW1, when former war pilots were at a loose-end, many of them turned to other things. In the summers that followed, strange markings were visible in the crops in some places, and the photographs revealed ancient buried ruins. One of the most spectacular images was from Caistor St Edmund, taken in 1929 (image from here, click on image to see larger image offsite).