Somerleyton Hall is a grand Victorian country house set in the border country between Norfolk and Suffolk, close enough to Great Yarmouth to make a good half-day excursion. The house has the showy confidence of a 19th-century estate, with formal rooms, gardens, and parkland that feel very different from the seaside amusements on the coast.
The gardens are the main reason to go when the house is not fully open: yew hedges, lawns, glasshouse details, and a maze give the visit enough variety for a slow wander. Check opening days before setting out, as country houses often run seasonal schedules.