This unique and incredible stag do experience which can either be an overnighter or a solitary day visit, depending on which location you've booked.
Most locations are old USSR military bases where the Russian army have withdrawn from. They were used to detain sailors or army personnel for crimes committed during their active service.
This activity would also work as a stag do prank, making sure that he gets that 3am drill he badly doesn't want!
Does your stag have an interest in the prison service? Is he into old military bases? If he is then this experience is definitely for you and your stag group.