This is the Karosta prison, or guardhouse, built in 1900 and originally serving as a hospital. This facility is unique in that it is the only prison in Europe open to tours. This place is known for its terrible and sometimes bloody events - for example, during totalitarian regimes, mass executions took place here. There are also no less gloomy reviews from locals, who claim that mystical things happen within these walls, and that restless ghosts roam the prison corridors.