A restored grain mill in rural Powys is quietly winning over families who want the whole valley to themselves. Mill House is one of four properties on an estate set deep in a green Welsh valley, where a stream threads past farmhouses and woodland and the only alarm clock is the 4am birdsong.

The cottage itself has serious history: the building is around 260 years old, and the original mill cogs still sit at the heart of the home. The renovation balances old and new well — low beams, red-brick fireplaces and rough wooden tables alongside sleek appliances and polished interiors. Five bedrooms, each with its own en suite and its own identity (think calming sage and moss tones, plus butter-yellow and Shakespearean nods), sleep a big family group comfortably. There's a split living room around a wood-burning stove, and a separate building, The Piggeries, with a big table for games, a bar area and a spa with a treatment room — the owners will arrange for a therapist to visit.

The grounds are the real draw. Ten acres of meadow and woodland hide an apothecary garden, an orchard, a firepit and barbecue, and — the highlight — a wood-fired hot tub and sauna beside the stream. The morning routine here is sauna followed by an icy dip in the water; evenings are for the hot tub under the stars, owls included. Wildlife is genuinely abundant: badgers burrow by the stream, otters pass at dawn and dusk, and kingfishers flash past if you're patient.

Bigger groups aren't forgotten. Halfway up the hillside, The Hay Barn offers five bedrooms and a stone terrace with valley views, while Hall House is a Grade-II listed three-bed with private gardens and its own Shepherd's Hut. At the top of the valley, the Grain Loft doubles as a one-bedroom apartment and an event space that has hosted yoga retreats and flower-arranging workshops.

When you do leave, Hafren Forest and the River Wye are within easy reach for a day's walking, along with small surrounding villages — though the writers admitted they were happy to hurry back for a stream dip and an evening by the fire.

This one's for multi-generational groups and dog owners (three dogs came along on the trip in question) who want a whole-place buyout rather than a hotel. If your ideal holiday involves walking all day, warming up by a stove all evening and spotting otters before breakfast, a valley in mid Wales deserves a spot on the list.