On the morning of Friday July 20, 1928, the crew of an RAF aircraft took photographs over the site of the Roman town of Venta Icenorum at Caistor St Edmund in Norfolk, a site which now lies in open fields to the south of Norwich.
The exceptionally dry summer meant that details of the Roman town were clearly revealed as parched lines in the barley. The pictures appeared on the front page of The Times on March 4, 1929 and caused a sensation.
Now, new investigations at Caistor Roman town using the latest technology have revealed the plan of the buried town at an extraordinary level of detail which has never been seen before. The high-resolution geophysical survey used a Caesium Vapour magnetometer to map buried remains across the entire walled area of the Roman town.
UPDATE: More here.