Wikipedia https://en.wikipedia.org/wiki/Beaumaris_Gaol
More information http://www.visitanglesey.co.uk/en/things-to-do/activities/beaumaris-gaol/#.V9ALVFWyNHw
Address 6 Bunker's Hill, Beaumaris LL58 8EP, United Kingdom
Coordinates 53°15'47.752" N -4°5'42.368" E