An interesting feature is the tunnel which runs from St Bricans Military Hospital, via the Prison to the former Collins Barracks.

[2] In 1936 Moss Twomey, the Chief of Staff of the Irish Republican Army was held in isolation in Arbour Hill before being transferred to Curragh Camp.

[3] On April 19, 1940, Irish Republican Jack McNeela died in Arbor Hill Prison after 55 days on hunger strike.

The 14 buried in Arbour Hill are:[5][6] The graves are located under a low mound on a terrace of Wicklow granite in what was once the old prison yard.

The prison is located on Arbour Hill at the rear of the National Museum of Ireland at Collins Barracks, Dublin 7.