Streetside driveway entrance to the tower (Yes, the "White Cliffs of Dover" do extend down the coast to Folkestone.)
The area is marked off to allow these researchers to do their work.
They advised me that they were just looking for some local Roman ruins. What was so special about that? (Well, for one thing, we don't have Roman ruins in America!)This was taking place across the road from the Martello Tower.