After an incredible summer of cultural events, from the Olympics to the Euros, Cadw has announced the return of Open Doors – an annual festival that gives everyone access to Wales’ most extraordinary and treasured historical locations.

Throughout September, more than 200 historic landmarks across Wales will host a range of free events, guided tours, and immersive experiences, some for the very first time. This year’s Open Doors event is especially poignant as Cadw celebrates its 40th anniversary with an exciting year of activities.

From castles and churches to clock towers and ancient burial chambers, and even Dylan Thomas’ Boat house, there are a huge range of locations taking part. The North Wales attractions include the National Trust owned Plas Newydd House and Gardens, Penryhn Castle in Bangor and Bodnant Garden in Conwy, will welcome visitors free of charge, inviting them to explore these remarkable places.

Open Doors is part of the broader European Heritage Day festival, aimed at highlighting the rich cultural diversity across Europe. This initiative offers a unique opportunity for people of all ages to connect with history, experience Wales’ vibrant heritage, and discover the captivating stories that have shaped the nation.

Ffion Reynolds, Cadw’s Heritage and Events Manager, said: “Open Doors is a chance for us to celebrate the diversity and resilience of Wales’ historic architecture in a way that’s accessible to all.

“By offering free access to these locations, we hope everyone will have the opportunity to experience the depth of our country’s history and culture and play a role in preserving these places for future generations.

“This year also marks a significant milestone for Cadw as it marks its 40th anniversary; it’s great to host the festival as part of the wider celebrations throughout the year.”

A full list of locations participating in the festival can be viewed on Cadw’s website, with a selection of locations across Wales noted below.

North Wales

Plas Newydd House and Garden – Saturday 14th – Sunday 15th September, 10:30am – 5pm (Booking not required)

The ancestral home of the Marquess of Anglesey sits majestically on the shores of the Menai Strait, a family home enjoying breathtaking views of Eryri (Snowdonia). The surrounding gardens are great for exploring, and include an Australasian arboretum, Italianate terrace garden and extensive woodland walks. There’s plenty for little explorers too, including a hand-built tree house, nine-hole Frisbee™ golf course, and adventure playground. You might even meet one of the resident red squirrels!

The house is home to a Waterloo-inspired military museum, works of art, regular exhibitions and, at its heart, Rex Whistler’s famous 58-foot fantasy landscape painting.

Penrhyn Castle – Saturday 21st – Sunday 22nd September, 10am-4pm (Booking not required)

The dominating stone façade of Penrhyn Castle hides more than just its internal redbrick construction. The unique architecture, opulent interiors and fine art collection sit alongside a history of sugar and slate fortunes, of social unrest and the longest running industrial dispute in British history.

Discover Penrhyn’s history, its vast rooms, neo-Norman stairways and Victorian kitchens.

The extensive grounds are perfect for exploring and enjoying spectacular views of Eryri (Snowdonia) and the North Wales coast.

Bodnant Garden, Colwyn Bay – 14 and 15 September, 9.30am-5pm (Booking not required)

This world-famous garden – created over 150 years ago – has an incredible plant collection from Britain and further afield. Set against the captivating Carneddau mountains of Eryri (Snowdonia), the garden thrives in vibrant hues, catering to all preferences and sparking excitement in every visitor.

Other events in north Wales include:

Visitors are advised to check the details of each event as ticket requirements vary at each location.

Further details, including a list of all participating locations, a complete schedule of events and ticketing information, are available at https://cadw.gov.wales/visit/whats-on/open-doors.