Although the sites didn’t see any enemy action, even when they were brought back into use in the 1860s, they still offer a fascinating glimpse into military life more than 200 years ago.

The Martello Tower, one of only three surviving in Scotland, offers views over Scapa Flow, Orkney's famous naval anchorage during both world wars. The battery gives visitors the chance to experience barracks life and features furniture and other items of military memorabilia.

Other details

Opening times:

June to Sept: Open Monday to Thursday. Visit is by guided tour (10.15am, 12 noon & 2.30pm), and you must book online in advance to guarantee entry.

1 Oct to 9 April: Closed