Fort Charlotte, Shetland

The second structure was built on the same site by Robert Mylne under the orders of Charles II at the start of the Second Anglo-Dutch War in 1665 at a cost of £28,000.

It was rebuilt in its current form in 1781 and named after Queen Charlotte,[2][3][4] but has never seen service during hostilities since then.

It housed a garrison during the Napoleonic Wars and was later a base for the Royal Naval Reserve.

Due to land reclamation and subsequently erected docks and buildings in front of the fort, it no longer dominates the shoreline and buildings in close proximity means the overall shape can only be seen from the air.

Today Fort Charlotte is managed by Historic Environment Scotland, and is the base for Shetland's Army Reserves.