Lincoln Castle Cannon. Hello friends. So how are you today? Happy Monday.  Today I am sharing some photos from around Lincoln Castle and the all-important Cannon. Lincoln Castle Cannon: Lincoln Castle Cannon. Perfect spot for a photo shoot!! Don't you think? Love a day out in Lincoln. So many thing's to see and do. But today I am focusing on this cannon.   The Lincoln Castle Cannon is a historic artillery piece located in Lincoln, England.  The cannon has a significant historical background and is a prominent symbol of the city's heritage.