National Nature Reserve, historic house and 18th-century landscape park, enclosing a medieval deer park.
A magical land of power and influence for more than 2,000 years, Dinefwr is an iconic place in the history of Wales. Two forts are evidence of a dominant Roman presence. The powerful Lord Rhys held court at Dinefwr and influenced decisions in Wales.
The visionaries, George and Cecil Rice designed the superb 18th-century landscape that you see today.
The 'hands-on' Newton House gives visitors an atmospheric circa 1912 experience. Exhibitions on the first floor tell Dinefwr's story and inspire visitors to explore the castle and park.
Dinefwr Castle is owned by the Wildlife Trust and managed by Cadw
Go behind the scenes
If you're visiting Newton House, a guided hidden house tour of our 17th-century mansion is a must. You can go behind the scenes to places not usually available to public view. Hear all the upstairs-downstairs gossip and enjoy some breathtaking views from the roof.
Go to the Visitor Centre on arrival or call on 01558 824512 to book your place.
Brand New Art Gallery
We've opened a new area of Newton House that was previously closed to visitors and thought it was the perfect place for an art gallery. We've a different exhibition on every month from some of the best artists in the country.
Our Llandeilo town shop is here to stay
Our brand new shop is unlike any other National Trust shop. We support local and independent business and stock our shelves with what we know our customers love. You're guaranteed to find something for everyone, from Welsh woolen blankets to beers and whiskeys.
Wonderful Wedding Venue
Get married in a land steeped in Welsh history and tradition. Newton House is nestled within an 800-acre countryside estate and can cater for ceremonies and civil services of up to 90 guests.
Stay with us
Penparc cottage on the Dinefwr estate
Carmarthenshire is known as the garden of Wales, so there's no surprise it's a popular holiday destination for those wanting to take a relaxing break and enjoy some of the most spectacular coast and countryside in the UK