- D.H. Lawrence Birthplace Museum - Eastwood
- Dad’s Army Museum - Thetford
- Dairyland Farm World - Newquay
- Dales Countryside Museum - Hawes
- Dalton Castle - Dalton-in-Furness
- Dandi’s Indoor Play Area - Scunthorpe
- Dartmoor Zoological Park - Plymouth
- Dartmouth Castle - Dartmouth
- Daytona Manchester - Trafford Park
- De Havilland Aircraft Heritage Centre - London Colney
- Deal Castle - Deal
- Deep Sea World - North Queensferry, Fife
- De Grey Mausoleum - Flitton, Nr Ampthill
- Dell Heritage Centre and Tea Rooms - Rochdale
- Denmans Garden - cFontwell, Arundel
- Denz Childrens Indoor Playcentre - Beeston, Nottingham
- Design Museum - London
- Devon’s Crealy Great Adventure Park - Exeter
- Dewa Roman Experience - Chester
- Dewstow Gardens and Grottoes - Caerwent, Monmouthshire
- Diddy Middys - Cleckheaton
- Diggerland Devon - Cullompton
- Diggerland Kent - Strood
- Dimbola Museum and Galleries - Freshwater Bay
- Dinefwr - Llandeilo, Carmarthenshire
- Dingles Fairground Heritage Centre - Milford, Lifton
- Dinosaur Adventure - Lenwade
- Dinosaur Isle - Sandown
- Dinosaur Safari Adventure Golf - Arkley
- Dinostar - Hull
- Discover Children’s Story Centre - Stratford, London
- Discovery Museum - Newcastle upon Tyne
- DLI Museum and Durham Art Gallery - Aykley Heads
- Doddington Hall and Gardens - Doddington
- Dolaucothi Gold Mines - Pumsaint, Llanwrda, Carmarthenshire
- Doodle Pots - Holt
- Dorney Court - Dorney, Windsor
- Dorset County Museum - Dorchester
- Dorset Heavy Horse Farm Park - Verwood
- Dove Cottage - Grasmere
- Dover Castle - Dover
- Down at the Farm - Houghton Le Spring
- Dr Jenner’s House - Berkeley
- Dragons Den - Keighley
- Drayton Manor Theme Park - near Tamworth
- Drusillas Park - Alfriston
- Duckys Park Farm - Flookburgh, Grange-over-Sands
- Dudley Zoological Gardens - Dudley
- Dudmaston Estate - Quatt, near Bridgnorth
- Duffield Castle - Duffield
- Dundee Science Centre - Dundee, Angus
- Dunham Massey - Altrincham
- Dunstanburgh Castle - Craster, Alnwick
- Dunster Castle - Dunster, near Minehead
- Dunster Museum and Doll Collection - Dunster
- Durham Castle - Durham
- Durham Cathedral - Durham
- Durham University Botanic Garden - Durham City
- Dymchurch Amusement Park - Dymchurch
- Dynamic Earth - Edinburgh
- Dyrham Park - Dyrham, near Bath
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