A few places to consider visiting in the UK for 2-3 nights:
Briery Wood, Lake District – Brierywood | Lake District Country Hotels
The Wood Norton. Cotswold – The Wood Norton – Guest Reservations
Llangoed Hall, Brecon, Wales – Country Hotel | Wedding Venue | Wales | Llangoed Hall
Stonefield Castle Hotel, Tarbert, Scotland – Family, Spa, Business, and Luxurious Hotels – Bespoke Hotels