The Fort can not be visited
FortressSheerness
Garrison Point Fort
Garrison Point Fort in Sheerness on the Isle of Sheppey in Kent was built on the recommendations of the Royal Commission report in the 1860s opposite Grain Fort to control the entrance to the Medway, Kent. It originally contained 36 Rifled Muzzle Loaders with calibres from 9in to 12in. Three Brennan Torpedo ramps were added in 1885.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://en.wikipedia.org/wiki/File:Grain4965.JPG
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 51.4468, 0.7445