The City Walls

 What remains today are a few bastions inside the city as well as Hadrian's Gate and its towers, the large tower facing the harbour and a few pieces of the harbour walls. One of the walls surrounds the yacht harbour and the other the city, almost like horseshoe. One of the remaining towers in the Castle Gate Square is now used as a clock tower. There are four gates in the city walls, which form entrances to the city.