An hour or so southwest of London, Petworth is the kind of small Sussex town people visit once and never stop recommending. Its headline act is Petworth House, a grand 17th-century mansion run by the National Trust, set in a sprawling deer park landscaped by Capability Brown. Inside, the house holds one of the country's most significant art collections outside London, including a remarkable group of paintings by J.M.W. Turner, who visited and worked here repeatedly and whose studio is preserved on site.
The park is free to wander on foot and doubles as a working deer estate — expect herds of deer, wide grassy paths and some genuinely lovely picnic territory. There are designated walking trails, and families will find playgrounds near the main visitor area. Booking a timed slot for the house is wise on weekends and in summer.
But the town itself is half the reason to come. Petworth has become a magnet for antiques hunters, with a dense cluster of dealers along its old streets — everything from Georgian furniture and vintage maps to oddities you didn't know you needed. It also punches above its weight for food, with independent cafés, a couple of well-regarded pubs and restaurants that draw diners from London for the day. The whole place is compact enough to explore on foot in an afternoon, which makes it an easy add-on to a house-and-park visit.
For travellers, the appeal is the combination: art and architecture, a proper English deer park, and a browseable market town, all within a short hop of the capital. It works as a day trip from London or as a stop on a wider West Sussex loop that could take in the South Downs, Chichester or the vineyards now dotted around the county.