Proudly dominating the Grimsby skyline in celebration of the town's fishing heritage is the 309 feet tall Dock Tower. It was built in 1852 to contain a 30,000 gallon hydraulic wrought iron reservoir to give hydraulic power to the lock gates and cranes at Grimsby Docks.

The tower is Grade I listed and is under a preservation order. Around 1 million bricks were used to build the tower. Local legend suggests that it was built on foundations of cotton wool but in reality bales of sheep's wool were used to absorb the excess water in the foundations.

The Dock Tower was used until 1892 when a replacement was erected. It is now a local landmark and used for charity abseils.