New research suggests that the UK's crumbling prisons should be closed and replaced with superjails.
So what better use for the old Victorian prisons than to turn them into hotels?
Take a look at some notable conversions from around the world
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This former Ottoman prison, the Sultanahmet, is now a luxurious boutique hotel – the Four Seasons in Turkey
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The old prison in Ljubljana, Slovenia, is now a youth hostel called the Celica
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The Charles Street jail in Boston has been converted into the luxurious Liberty Boston hotel
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The old Carleton County jail in Ottawa, Canada, is now a youth hostel
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The Het Arresthuis in the Netherlands once housed 105 prisoners but has been transformed into a luxury hotel
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The island of Långholmen, Stockholm, was once a penal colony for women in the 1700s, but is now the location of a chic hotel
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The former Liepaja prison in Latvia offers visitors the chance to experience life inside a Soviet prison; here, a member of staff poses as a prison guard
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A passageway at the converted Jailhotel in Lucerne
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The Lloyd hotel in Amsterdam was a former youth prison
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A hallway in the Katajanokka prison hotel in Helsinki, Finland
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The Malmaison hotel in Oxford was converted from Oxford prison