It has been modified and added to over the centuries, as more modern technology, and different enemies, emerged. Perhaps the most interesting of the more recent additions are the network of tunnels built in layers deep inside the chalk cliffs.

Started in Napoleonic times, they were later expanded and used as a military hospital and command post during the Second World War. The town of Dover, below in the valley, has little else to offer, being essentially a port for the ferries across the English Channel, but the neighbouring Channel port and resort of Folkestone is a far more pleasant stop.

It may not have the draw of Dover Castle, but its Victorian cliff top promenades, award winning coastal park, and sandy beach around a pretty fishing harbour, all help create its relaxed friendly atmosphere. Take a trip on the water powered cliff lifts, visit the nearby 12 th century parish church, and wander down the artistic quarter of the cobbled Old High Street.