Following an action-packed summer of events, Cadw has announced the return of Open Doors – an annual festival that invites people to explore Wales’ most extraordinary, unusual, and treasured historical locations, for free.

With Wales enjoying its sunniest spring and summer on record, more people have been encouraged to spend time outdoors and visit their local heritage sites. Open Doors builds on this momentum, offering free, flexible admission to some of Wales’ most popular monuments - perfect for both planned visits and spontaneous days out while the good weather continues.

Throughout September, visitors can enjoy a range of unique events, guided tours and immersive experiences at more than 200 historic landmarks across Wales. Some of these locations are opening their doors for the very first time, giving visitors a unique opportunity to explore hidden heritage.

Nineteen of Cadw’s own iconic monuments will open their doors as part of the festival - including Manorbier Castle, Laugharne Castle and St Davids Bishop’s Palace.

Funded and organised by Cadw, the Open Doors festival forms part of the wider European Heritage Days celebration, dedicated to showcasing the rich tapestry of cultures across the continent. In Wales, it opens a gateway for visitors of all ages to uncover the compelling stories that have helped shape its identity.

Perched above the sandy beach, the 11th-century Norman castle at Manorbier invites visitors to wander its ancient halls, climb its towers, and uncover centuries of stories on September 17, between 10am and 5pm. As part of Open Doors, guests can enjoy exclusive tours of Castle House (normally only accessible to overnight guests) offering a rare glimpse into this historic retreat.

Laugharne Castle, Carmarthen is the ‘brown as owls’ castle beloved by Dylan Thomas, Laugharne’s most famous resident. He wrote ‘Portrait of the Artist as a Young Dog’ in the castle’s summerhouse, perched above glorious views of the Taf estuary. Built in the 13th century before being partially dismantled during the Civil War, visitors will get free access to this mansion for a full weekend: September 20 and 21, between 11am and 4pm.

St Davids Bishop’s Palace was the principal state residence of the Medieval Bishops of St Davids. A highly ornate structure, it reflects the power and wealth of the medieval church. During Open Doors, guided tours on the afternoons of September 27, 28 and 29 offer a deeper look into the history and grandeur of this remarkable location.

Dr Ffion Reynolds, Cadw’s Senior Heritage Events and Arts Manager, said:

“Open Doors offers a brilliant opportunity for people to discover and celebrate the richness and resilience of Wales’ historic architecture, making heritage accessible to all.

“By welcoming visitors free of charge, we’re opening pathways to experience the depth of Welsh history and culture and encouraging each person to help preserve these remarkable locations for future generations.”

Visitors are advised to check the details of each event as ticket requirements vary at each location. A full list of participating locations, including Dinefwr estate at Llandeilo, can be viewed on Cadw’s website.