Grenville Battery
Grenville battery and the adjacent Maker battery were constructed in the late 1880s to defend the western approaches to Plymouth Sound from a potential French invasion. Redoubt 4 was used as a starting point for the Grenville battery which had already been rebuilt in stone in 1790. The original 12.5 inch muzzle-loading guns from the 1880s were upgraded in the early 1900s to 6 inch breach-loading guns so the remains today are a mixture from the two periods. The emplacements of the older guns can be identified by their toothed tracks.
On walks
- Mount Edgcumbe to Kingsand (5.7 mile walk)