londonderry walls

You can make a complete circuit along the top of the walls which was rebuilt in 1789. One of the cannon over Shipquay Gate was a gift from Elizabeth the first in 1590. Four others were given to the city in 1642 by the Mercers, Grocers, Vintners and Merchant Taylors of London. The walls are punctuated at intervals with bastions and picturesque stone watch towers and dozens of gunloops-small ones for muskets and large ones open at the top for cannon.