Inchgarvie (occasionally "Inch Garvie") is a small, uninhabited island in the Firth of Forth. Its name comes from Innis Garbhach which is Scottish Gaelic for "rough island". On the rocks around the island sit four caissons that make up the foundations of the Forth Bridge.Inchgarvie’s fortifications pre-date the modern period. In the days when boats were the only way to cross the Firth of Forth, the island was on the main route between North Queensferry in Fife and South Queensferry in Lothian.