Featured in many a rebel song and occupying a notoriously dark place in Irish history, Kilmainham Gaol should be high on the list of Dublin's best places to visit for those with any interest in Ireland's troubled past.

It was here that the leaders of the 1916 Uprising were brought and, after being convicted of High Treason, executed in the prison yard. The only one spared was future Irish President Eamon De Valera who, by virtue of his American citizenship, didn't suffer the same grisly fate.

Dating from 1796, the prison was a dank vile institution that housed those guilty of such misdemeanors as being unable to pay their train fares and, during the famine, the destitute and hungry. In Irish eyes, Kilmainham became an irrevocable symbol of oppression and persecution.

A visit here will open your eyes and will remain with you indelibly. The yard mentioned earlier is particularly spine-chilling. In short, this is one of Ireland's absolute must-sees.