The Patarei prison was originally built as a sea fortress in 1820. Over the years it has had different functions; in 1920, it became a prison. It housed inmates until 2004, and has been left virtually untouched since. It serves as a chilling reminder of the Soviet occupation of Estonia (1944 to 1991), when it was run by the KGB. Unfortunately from October 2016, Patarei fortress prison has been closed and therefore access to Patarei is no longer possible. If they do reopen it, I would like to return but here some infrared images on a grey day of the exterior and neighbouring works!
(I am now back in UK after an 'interesting' day of delays due to UK snow - will continue to post from the trip as and when time!)