Grimsby Dock Tower(N.E.Lincs) is visible for miles before you reach the town and is a famous landmark. It was so noticable it was on German bombing maps as a guide to the docks. An order to demolish it because of this was made but never happened. Designed like the Palazzo Pubblico in Siena. It was built in 1852 with the purpose of containing a 30,000UK gallon(136 m) water reservoir, which was originally used to provide hydraulic power to the lock gates and cranes of Grimsby Docks. You can walk up to it and twice a year people abseil down the side to raise money for charity by the Grimsby Rotary Club. I always MEANT to do it. I like abseiling. It is possible to climb the structure to see the amazing views over the whole of Grimsby and Cleethorpes though it is not open to the public usually other than sometimes on Dock open days.