Quite a few National Trust and private houses that are open to visitors within an hours drive of Preston.
North
Lancaster Castle
Leighton Hall
Levens Hall
Holker Hall
Sizergh Castle (NT)
Blackwell House
Brantwood
Dove Cottage
Rydal Mount
Townsend Cottage(NT)
Hill Top (NT)
East
Samlesbury Hall - 3 miles east, open most days.
Hoghton Towers - 6 miles east, open most days.
Chingle Hall - 2 miles north east.
Gawthorpe Hall (NT)
South
Dunham Massey (NT)
Quarry Bank Mill (NT)
Tatton Park (NT)
Speke Hall (NT)
Arley Hall
Tabley Hall
Moreton Hall (NT)
Wigan Pier
Lyme Park (NT)
Jodrell Bank
Gawsworth Hall
West
Lytham Hall
Rufford Hall