The walled garden rooms
A chain of small walled gardens west of the house, Pompeian, Italian and Mediterranean, changing mood with every stone doorway.
A Welsh coal fortune turned into 55 acres of garden on an 84-acre estate, billed as the finest Edwardian garden in Wales and Grade I on the register of historic parks. Coal magnate John Cory bought the estate in 1891, built the grey Victorian mansion in 1893 and commissioned landscape designer Thomas Mawson for the grounds; Mawson worked alongside Cory's son Reginald, a plant collector who bankrolled seed-hunting expeditions to China and beyond. What you get today is a Great Lawn cut by a long canal ending in a bronze Chinese dragon fountain, and to either side a run of small walled 'garden rooms', each with its own character: a Pompeian court with columns, an Italian garden, a Mediterranean one, a Paved Court, a physic garden of medicinal herbs and a Theatre Garden for plants in pots. Those rooms are the reason to come. You step through one stone doorway after another and the whole mood shifts: dark evergreen, then blazing summer borders, then the shade of a fig. East of the house an arboretum of rare trees includes a paperbark maple grown from seed brought back from China more than a century ago, and nearby a glasshouse of cacti and orchids doubles as shelter when the Welsh rain arrives. The house is another matter: Dyffryn House is mostly closed while the National Trust repairs it after decades of neglect, with only a House of Discovery exhibition in the Morning Room, open Thursday to Saturday, 11:00 to 15:00. Do not expect a stately-home tour; the gardens are the story and the house is their grey backdrop. Two cafés sit in the grounds, one by the play area at the Welcome Centre before the pay point and a smaller Gallery Café inside the gardens. For families it is an easy day. Paths are wide and mostly level, fine for pushchairs and wheelchairs, there are two wooden play areas and lawns for running about or a picnic on a rug, and even in the school summer holidays it never packs out the way Cardiff Castle does; no timed entry, no advance booking. Make it a sunny morning or a long afternoon; two to three hours with a tea break is about right. The café food is not halal-certified, and bringing your own picnic is welcome in the grounds. Getting there from Cardiff is simplest by car: about 12 km west along the A48, then the turning at St Nicholas village, 20 to 25 minutes from the centre, with a large free car park and EV chargers. Public transport is not worth relying on: buses along the A48 drop you in the village for a walk of roughly twenty minutes down a country lane, so a taxi saves the time. The gardens open every day of the year bar Christmas, from 10:00 until 17:00 in summer and around 16:00 in winter, with last entry an hour before closing, but from November to February the borders are bare and the light is short; April to September is the season, with May and June blossom the high point.
A chain of small walled gardens west of the house, Pompeian, Italian and Mediterranean, changing mood with every stone doorway.
A long canal cuts the lawn in front of the house and ends in a bronze Chinese dragon fountain, the best photograph on the estate.
Trees grown from Chinese seed brought back a century ago, and a glasshouse of cacti and orchids to shelter in when it rains.
Dyffryn Lane, St Nicholas, Vale of Glamorgan CF5 6FZ
Worth it if you have a car and a dry day: level paths for pushchairs, two wooden play areas and uncrowded lawns for a picnic. Without a car, or on a wet day or in winter when the borders are bare, stick to free Bute Park in central Cardiff.
The gardens are the point; the house is mostly closed for restoration, with only an exhibition in the Morning Room open Thursday to Saturday, 11:00 to 15:00, worth ten minutes if your visit falls on those days rather than a stately-home tour.