Castle Hill, overlooking Newhaven, has been a defensive site since the late Bronze Age and was occupied for at least a thousand years from that time [it had a hillfort upon it]. When Britain feared invasion from the French during the 19th century the site came into play once more. Despite the government's reluctance to heavily invest in a series of forts along the south coast Lord Palmerston got his way. They were built, but the threat never materialised and they remained unused. They became known as the 'Palmerston's follies', but this large example continued to play a defensive role during both World Wars. It isn't a place I might go to of my own volition [it was the second part of Mr GBT's birthday outing], but it approaches the military period of history for which it was active from many different angles. There was much of interest for both of us. I'm reluctant to use the word "enjoy" because it seems very trite when the subject is war. It'