Olton Mere was created as a reservoir to act as a feeder for the Grand Union Canal, which was opened in 1799. The Mere was formed from marshland fed by Folly Brook (now Hatchford Brook) and was designed to hold 150 locks full of water, but this was not achieved until the Mere was extended in 1834. It is the largest of the few areas of open water in Solihull and supports a large number of waterfowl. The woodland surrounding the Mere has remained undisturbed for many years, providing an important habitat for plants and animals.