Scotland's Massada. The hill looks like a massive plough cutting through the landscape off the M74. Unmistakable. It can be seen from the Devil's Beeftub about 30 km North (and would be visible from White Type Roman Watchtower in the forestry beyond the Beeftub)
The earthworks of the Roman Installations are remarkable. Particularly the "Three Brethren" which remain mighty to this day, as do all of these siegeworks.