Farnborough Hall is a country house of honey-coloured Hornton stone, quarried locally, set among lakes and landscape gardens in rural Warwickshire near Banbury and still lived in by the Holbech family, who open it for a few afternoons a week between April and September. Inside, the finest 18th-century plasterwork, full of natural forms and wildlife, decorates rooms hung with treasures from the Grand Tour beside family photographs and keepsakes. Outside is the landscape vision of William Holbech II, laid out with Sanderson Miller as a ferme ornee of water features, walkways and planting, its showpiece the mile-long grass terrace that climbs past hidden temples to a tall obelisk with views over the surrounding country. Dogs on leads are welcome in the grounds but not the house, with assistance dogs admitted everywhere. The Trust's easy 5.5-mile parkland walk circles the estate from the car park. Reviewers rate the walk to the obelisk and the volunteers' room-by-room commentary, with the library and paintings the highlights indoors, and note that only a handful of ground-floor rooms are open. Tips from visitors: check the limited opening before setting out, bring cash as cards are not taken, and there is no safe access for coaches.