In the early 1800s, Princetown's infamous jail was home to French and American prisoners of war. It became a convict jail in 1850, and today still houses around 640 inmates. Just up from the looming gates, this museum provides a chilling glimpse of life inside. Look out for straitjackets, manacles, escape stories and the makeshift knives made by modern-day prisoners.
As part of plans to shut older jails, Dartmoor Prison is due to close in 2023.