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.
Explore this year’s Open Doors Events here
We're delighted to be both funding and hosting Open Doors in 2015.
And to celebrate, we're opening the doors to all of our paid-admission sites for free over the final weekend in September.
So whether you choose to play princesses at Castell Coch, get inspired like Dylan Thomas in the surroundings of Laugharne Castle, or peek inside the mighty walls of Caernarfon Castle - you'll have a great time exploring 6,000 years of Welsh history at our sites.