Hango Hill is an historic mound on the coast road between Castletown and Derbyhaven, Malew parish, Isle of Man.
[3] It is most famous as the execution site of Illiam Dhone (William Christian) in January 1663, for his part in the Manx rising of 1651 against the Derby family[4] and there is a broken-down monument with a plaque commemorating this.
The monument is said to be the remains of a late 17th century summerhouse, or hall, known as Mount Strange, after a subsidiary title of the Earls of Derby.
A hall was built on the summit of Hango Hill by the earls of Derby in the years following the execution of William Christian in 1663.
Early drawings show a building with battlements, and it has been referred to as a "blockhouse"; it seems however only ever to have served as a banqueting hall and a summerhouse, and it was associated with horseracing organised by the Earls along the dunes to the east onto Langness – the first "Derby" races.