Golta is a heather-clad moorland that stretches out into Scapa Flow away from the neighbouring oil terminal. To access it you must contact the terminal’s security first by phoning 01856 884 359.

Unassuming at first, closer inspection reveals a number of sites of interest. Midway across the peninsula are the remains of the World War Two Z Battery, an anti-aircraft rocket battery that formed part of the infamous Scapa Barrage air defence.

Made up of ammunition huts, rocket launcher bases set out in a grid, and the remains of a military camp, it’s a slightly surreal scene. The Z Battery is one of the most complete remaining sites of its type to be found anywhere in the world.

Further east, the almost medieval-looking remains of the World War One YMCA building loom large over the landscape. This old building is visible right around Scapa Flow and a close-up look reveals great fireplaces and chimneys. The YMCA was once a grand building used by Naval personnel as a place to relax. Close by you’ll see large craters in the moorland – these were the result of German bombing of the area during World War Two.

Nearby is the wartime St Vincent Pier – on the coast here you’ll find large metal rings, the remains of boom defence nets, used to protect Scapa Flow’s approaches from submarine and torpedo attack.

A walk here and back from the Oil Terminal is around three miles long in total and the path is rough in places, so do make sure you have enough time to return to the pier for your ferry back to the Orkney mainland. The road is really not suitable for cars, so leave your vehicle behind if you're planning a visit.