Mylne's Mill is a 17th-century folly perched on the top of 'Fishers Bistro' at historic Leith harbour. It was erected as a windmill, then became a signal tower in the 1800s.The stone battlements make it look like a castellated tower and were added during the Napoleonic Wars, when the Mill was converted for use as a signal tower for relaying flag messages to ships entering the harbour, letting them know the depth of the harbour bar. For that reason, it is sometimes known as the Leith Signal Tower. The modern street art depicting the cartoon character 'Oor Wullie' are scattered through Scotland as a contribution to the nationwide public art trail. It brightens up a rather grey and murky day.