Inchkeith is an island in the Firth of Forth, Scotland, administratively part of the Fife council area.
Inchkeith has had a colourful history as a result of its proximity to Edinburgh and strategic location for use as home for Inchkeith Lighthouse and for military purposes defending the Firth of Forth from attack from shipping, and more recently protecting the upstream Forth Bridge and Rosyth Dockyard. Inchkeith has, by some accounts, been inhabited for almost 1,800 years.
Wikipedia https://en.wikipedia.org/wiki/Inchkeith
Coordinates 56°1'56.729" N -3°8'7.75" E