David Tennant will arrive on the small screen this month telling the story of one of the UK's most prolific serial killers, Dennis Nilsen.The ITV series was filmed at Shepton Mallet prison in Somerset and judging by it's dodgy past, it's no surprise it was chosen as the backdrop for the grisly story.HMP Shepton Mallet, sometimes known as Cornhill, officially closed in 2013 but it's haunting past will never be forgotten.Built in 1610, the prison has been home to thousands of criminals for the past 400 years and is now open to the public by Jailhouse tours, who run daily guided tours of the site.However, for those who enjoy feeling spooked from time to time, they also offer evening ghost tours and escape events.Tripadvisor describes it as.
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