An authentic 'Hitler's Bunker' is on sale, featuring acres of Nazi trenches, gun stations and battlements constructed by Germans during an occupation of the British Isles.
The destination formerly hosted 24 soldiers and officers from the Third Reich, after they invaded Guernsey in the Channel Islands.
Hitler obsessively fortified the Channel Islands after invading them in 1940, but the British decided they were of no strategic importance and never sought to liberate them.
The two bunkers on the seven acre plot were built between 1942 and 1944.
It houses huge gun emplacements lodged in a hexagonal concrete pit with a range of 22 kilometres.
The Giffoine plot up for sale with Bell & Co estate agents is situated on the south west of the island.
According to agents, the site offers a rare opportunity to see what D-Day might have felt like from the German perspective.
A spokesperson for Bell & Co said: "This is an incredible opportunity to offer seven acres of living history dating back to the second World War.
"The land is on the south west corner of Alderney (3.5 square miles with a population of 2,100) with superb open sea views to the west and south."
The Channel Islands were invaded by Germany on 30 June 1940 German forces became trapped after D-Day.
Despite doing considerable work to maintain the site, unfortunately the current owner has been forced to sell due to ill health.
Bell & Co's managing director Andrew Eggleston says he hopes that any future buyer would keep the site open to the public to explore as it has been for years.
He said: "It would be a terrible shame if someone were to buy it and then start padlocking it. They've done so much work to it, it's quite amazing."
The land will be sold by sealed bid, with the deadline set for Friday 9 December.
The Channel Islands were among the most heavily fortified parts of Hitler's Atlantic Wall, with one twelfth of the resources for the whole defence structure along the Atlantic coast dedicated to them.
But the Allies had no plans to re-take the Channel Islands, so the extensive defences saw no action and were basically irrelevant.
The site is expected to sell for somewhere around £40,000 and Mr Eggleston said that expressions of interest had already been made.
