The school owns the Owls' Nest, a large hut situated in Disley, south of Manchester, near to Lyme Park. The original ex-Army hut was opened at Christmas 1920, but it was destroyed by a German bomb on 23 December 1940, and a replacement was provided in 1950. The building is used by forms and activity groups of the school as a base for outdoor trips and camping expeditions. It is most frequently used by classes in Years 7 and 8, who spend a weekend there with their form teacher and form prefects. Wide games such as "British Bulldog" take place in the surrounding fields, and orienteering challenges in nearby Lyme Park. It is also used by school clubs such as the MGS Astronomical Society who use it for observational weekends because it is away from the lights of Manchester. The name refers to the school's logo of the owl.