I was visiting Ireland for eye surgery and had Kilmainham Gaol on my bucket list of places to see. You can almost feel the presence of spirits wandering around inside the jail.
Walking down this hallway,gives you a sense of the claustrophobia and hopelessness that the prisoners must have felt.
I used a Canon 7D on a tripod, with a 10-20 mm Sigma lens. Settings were F4, 1/30th at 800 ISO.