Sorry I have Just Found This Which Has Been Running since 30th June 2016 at various locations. **(I Have Put Pictures Of Some Of The Locations Swansea ,St Fagans Pembroke Etc)**
Organised by Cadw, the Welsh Government’s historic environment service, Open Doors offers both local people and visitors alike the chance to explore the hidden treasures of Wales’s culture and history.
Our regional lists make it easy to find out about fascinating Open Doors events near you. From former police stations to radio museums to atmospheric abbeys, there’s plenty to see and do across Wales this September!
If you would prefer to view Open Doors events by date — or search using keywords — you can use our Event Finder.