Here are a few inspirational venues that I think are worth a mention.
The link will take you to a page with a little information and a selection of photographs from each venue.
Castle Howard | Hodsock Priory | Hassop Hall | Hazlewood Castle | Rudding Park | Whirlowbrook Hall
Aston Hall | Ripley Castle | Waterton Park | Whitley Hall | Bolsover Castle | Chatsworth House
East Lodge | Ringwood Hall | The Maynard