Nottingham is littered with caves, the city being built upon soft sandstone. These are in the rock just beneath Nottingham Castle. As far back as the middle ages, they were used as homes by the less well off, hence the nickname 'pauper holes'. | by Duncan~, via Flickr
Derby Gaol, Derbyshire - refers to five gaols, two of which are open to the public; Friar Gate Gaol (1756) and Vernon Street Prison (1843). The Friar Gate Gaol was the site of many hangings, and is now a museum that actually contains a replica of the original gallows. Not surprisingly, much activity has been reported at the Friar Gate Gaol, including a gray mist that creeps along the room near the main entrance and the smell of roses, which has yet to be explained.