Not many places offer this kind of privacy.
Built between 1861 and 1880 to protect Portsmouth from French naval attacks, No Man’s Land Fort was last used for military purposes during WWII and in later years it has been transformed into a luxury hotel with 21 rooms, indoor heated swimming pool and 2 helipads. But due to multiple problems, including finding a dangerous virus in the water supply in 2004, this incredible location ended up for sale in 2005 and 2007. But the 4 million British pounds price tag kept buyers away and in the meantime the owning company went bankrupt. Now the building is on auction again, while the owner lies in prison.
If you have the money, No Man’s Land Fort is worth a look, it’s 81 meters in diameter and 18 meters in height, it’s built out of granite blocks and reinforced with a thick iron plating and if its luxury doesn’t convince you, at least you know that if you ever have to fend off a naval attack, you have a chance.