Some may be stretching the term "zoo" slightly, but here's my list to date:
Austria
Safaripark Gänserndorf
Alpenzoo Innsbruck-Tirol
Haus der Natur
Salzburger Tiergarten Hellbrunn
Schönbrunner Tiergarten
Wüstenhaus Schönbrunn
Belgium
Zoo Antwerpen
Aquatopia, Antwerp
Serpentarium Blankenberge
National Sea Life Marine Park Rescue & Conservation Centre
Dierenpark Planckendael
Cyprus
Limasol Zoo
Czech Republic
Zoologická Zahrada Města Brna
Zoo Chleby
Podkrušnohorsky Zoopark Chomutov
Zoologická Zahrada Děčín
Rajské Ostrovy, Decin
Zoologická Zahrada Dvůr Králové
Zoo Hodonín
Zoologická Zahrada Liberec
Zoologická Zahrada Olomouc
Akva Tera, Pilsen
Zoologická a Botanická Zahrada Města Plzně
Zoologická Zahrada Praha
Zoologická Zahrada Ústí nad Labem
Denmark
Zoo København
Danmarks Akvarium
France
Parc Zoologique et Botanique de Mulhouse
L'Aquarium Tropical de la Porte Dorée, Paris
Menagerie du Jardin des Plantes
Parc Zoologique de Paris
Germany
Zoologischer Garten Augsburg
Berlin Bear Pit
AquaDom & Sea Life Berlin
Tierpark Berlin-Friedrichsfelde
Zoologischer Garten Berlin
Tierpark Chemnitz
Zoo Köln
Tierpark Cottbus
Zoo Dortmund
Zoologischer Garten Dresden
Zoo Duisburg
Aquazoo Düsseldorf
Thüringer Zoopark, Erfurt
Zoologischer Garten Frankfurt
Zoom Erlebniswelt, Gelsenkirchen
Tierpark Gettorf
Zoologisher Garten Halle
Tierpark Hagenbeck
Erlebnis-Zoo Hannover
Tiergarten Heidelberg
Serengeti-Park Hodenhagen
Zoologischer Garten Hoyerswerda
Zoologischer Garten Karlsruhe
Zoo Krefeld
Zoologischer Garten Leipzig
Tierpark Lübeck
Wildpark Lüneburger Heide
Zoologischer Garten Magdeburg
Sea Life München
Tierpark Hellabrunn, Munich
Allwetterzoo Münster
Tierpark Neumünster
Tierpark Nordhorn
Tiergarten Nürnberg
Zoologischer Garten Osnabrück
Niederrheinpark Plantaria
Wildpark Poing
NaturZoo Rheine
Zoologischer Garten Rostock
Wildpark Schwarze Berge
Zoologischer Garten Schwerin
Zoologisch-Botanischer Garten Wilhema, Stuttgart
Sea Life Timmendorfer Strand
Vogelpark Timmendorfer Strand
Vogelpark Walsrode
Zoo Wuppertal
Hungary
Fővárosi Állat- és Növénykert, Budapest
Xantus János Állatkert, Győr
Ireland
National Sea Life Bray
Dublin Zoo
Netherlands
Dierenpark Amersfoort
Artis Zoo
Apenheul
Burgers' Zoo, Arnhem
Vogelpark Avifauna
Safari Beekse Bergen
Zoo Best
Dierenrijk, Eindhoven
Noorder Dierenpark, Emmen
Dierenpark Wissel, Epe
Dolfinarium Harderwijk
Zoo Parc Overloon
Ouwehands Dierenpark, Rhenen
Diergaarde Blijdorp
Stichting Nederlandse Opvang Papegaaien, Veldhoven
Wassenaar Wildlife Breeding Centre
Poland
Śląski Ogród Zoologiczny w Chorzowie, Katowice
Krakowski Ogród Zoologiczny
Miejski Ogród Zoologiczny w Łodzi
Ogród Zoologiczny w Opolu
Ogród Zoologiczny w Poznaniu - Nowe Zoo
Ogród Zoologiczny w Poznaniu - Stare Zoo
Miejski Ogród Zoologiczny w Warszawie
Miejski Ogród Zoologiczny we Wrocławiu
Slovakia
Zoologická Záhrada Bratislava
Spain
El Arca
Rio Safari Elche
Fauna Iberica
Faunia, Madrid
Zoo Guadalajara
Zoo-Aquarium de la Casa de Campo
Terra Natura, Benidorm
Bioparc Valencia
L'Oceanogràfic, Valencia
Jardin Zoologico de Valencia
Safari Park Vergel
Switzerland
Zoologischer Garten Basel
Tierpark Lange Erlen, Basel
Zoologischer Garten Zürich
United Kingdom
Aberaeron Aquarium
Amazon World Zoo Park
Amazonia, Great Yarmouth
Amazonia, Motherwell
Anglesey Sea Zoo
Aquatic Experience
Argyll Wildlife Park
WWT Arundel Wetland Centre
Auchingarrich Wildlife Centre
Axe Valley Bird & Animal Park
Ward Park, Bangor
Banham Zoo
Bank Mill Visitor Centre
Basildon Zoo
Battersea Park Children's Zoo
Baytree Owl Centre
Beale Park
Beaver Water World
Beck's Bird Barn
Belfast Zoological Gardens
Bentley Wildfowl & Motor Museum
Birdland (both sites)
Birmingham Botanical Gardens
Birmingham Nature Centre
National Sea Life Birmingham
Black Isle Wildlife Park
Blackbrook Zoological Park
Sea Life Blackpool
Blackpool Tower Aquarium
Blackpool Zoo Park
Blair Drummond Safari & Leisure Park
Blenheim Palace Butterfly Farm
Blue Planet Aquarium
Bodafon Farm Park
Bolton Museum Aquarium
Bolton Animal World
Borth Animalarium
The Oceanarium, Bournemouth
Brean Down Bird Garden
Brent Lodge Park
Bridgemere Wildlife Park
Sea Life Brighton
Bristol Zoo Gardens
Wild @ Bristol
British Wildlife Centre
Brixham Aquarium
Paradise Wildlife Park
Buckfast Butterflies & Dartmoor Otter Sanctuary
Calderglen Children's Zoo
Camperdown Wildlife Centre
WWT Castle Espie Wetland Centre
Cefn-yr-Erw Primate Sanctuary
Cheshire Waterlife & Falconry
Chessington World of Adventures
Chester Zoo
Chestnut Centre Otter Owl & Wildlife Park
Churnet Valley Wildlife Park
The Jungle, Cleethorpes
Colchester Zoo
Combe Martin Wildlife & Dinosaur Park
Conwy Aquarium
Conwy Butterfly Jungle
Conwy Water Gardens
The Cornish Birds of Prey Centre & Animal Park
Cotebrook Shire Horse Centre
Cotswold Falconry Centre
Cotswold Farm Park
Cotswold Wildlife Park
Cricket St. Thomas Wildlife Park
Amazona Zoo, Cromer
Crystal Palace Children's Zoo
Dartmoor Wildlife Park
Deep Sea World
Tropical Birdland, Desford
Drayton Manor Park & Zoo
Druidstone Wildlife Park
Drusillas Park
Dudley Zoo
Eagle Heights
Eden Ostrich World
Edinburgh Butterfly & Insect World
Edinburgh Birds of Prey Centre
Edinburgh Zoo
Exmoor Zoological Park
Exmoor Falconry & Animal Farm
Exotic Pet Refuge, Peterborough
Exploris Aquarium
Rowen Nature Centre
Birdworld & Underwater World
Felinwynt Butterfly Jungle
Fife Animal Park
Five Sisters Zoo Park
Flamingo Park - Seaview Wildlife Encounter
Flamingo Land
Folly Farm Family Adventure Park
Fort Victoria Marine Aquarium
Furness Owls
Gatwick Zoo & Aviaries
Gauntlet Birds of Prey Centre
Gentleshaw Wildlife Centre
Glasgow Zoopark
Glasgow Zoology Museum
Golders Hill Park
Grangewood Zoo
Sea Life Great Yarmouth
The National Seal Sanctuary, Gweek
Hagley Falconry Centre
Hamerton Zoological Park
Harewood Bird Garden
Harry Tuffin's Wildlife Park
Blue Reef Hastings
Paradise Park, Hayle
Heythrop Zoological Garden
The Highland Wildlife Park
Hillside Bird Oasis
Hoo Farm Animal Kingdom
Howletts Wild Animal Park
The Deep, Hull
Hunstanton Sea Life Sanctuary
Ironbridge Aquarium
Owl and Monkey Haven, Isle of Wight
Jersey Zoo
Jersey Aquarium
Kendal Reptiles
Kingsley Bird and Falconry Centre
Small Breeds & Owl Centre, Kington
Wildlife Park Kirkcudbright
Knowsley Safari Park
Lake District Coast Aquarium
Lakeland Bird of Prey Centre
Lakeland Wildlife Oasis
Lakemore Country Park
Lakes Aquarium
Leeds Castle Aviaries
Tropical World, Leeds
Lenwade Zoological Gardens
Linton Zoo
Liverpool Museum
Living Coasts
WWT National Wetland Centre Wales
Loch Lomond Aquarium
Loch Lomond Bird of Prey Centre
London Aquarium
London Butterfly House
WWT London Wetland Centre
London Zoo
The Butterfly & Wildlife Park, Long Sutton
Longleat Safari Park
The Monkey Sanctuary, Looe
Lotherton Hall Bird Garden
The Seal Sanctuary, Mablethorpe
Manchester Museum
Manor House Wildlife Park
WWT Martin Mere Wetland Centre
Marwell Zoological Park
Matlock Bath Aquarium
The Midland Bird Garden
Mole Hall Wildlife Park
Monkey World Ape Rescue Centre
The World Owl Centre, Muncaster
Liberty's Raptor & Reptile Centre
New Forest Otter, Owl & Wildlife Park
New Forest Reptile Centre
The International Centre for Birds of Prey
Blue Reef Newquay
Newquay Zoo
Noah's Ark Zoo Farm
Norfolk Wildlife Park
Tropical Butterfly House, Wildlife & Falconry Centre, North Anston
The Scottish Sea Life Sanctuary, Oban
Oban Zoological World
Paignton Zoological & Botanical Gardens
Palacerigg Country Park
The Parrot Zoo
Paultons Park
Pensthorpe Waterfowl Park
Pen-y-Ffrith Bird Gardens
Pili Palas
Plantasia, Swansea
The National Marine Aquarium, Plymouth
Poole Aquarium & Serpentarium
Porfell Animal Land
Port Lympne Wild Animal Park
Blue Reef Portsmouth
Prinknash Bird Garden
Pudsey Park, Leeds
The Raptor Foundation
Rays Farm
Rhyl SeaQuarium
Riber Castle Wildlife Park
Robin Hill Zoological & Adventure Park
Rock Water Bird Centre
Animal Zone, Rodbaston College
The Tropical Bird Gardens, Rode
St. Andrews Aquarium
St. David's Oceanarium
Tropical Bird Park, St. Lawrence
Isle of Wight Zoo
The Monkey Rainforest, Sandwich
The Rare Species Conservation Centre & Zoological Gardens, Sandwich
Santago Rare Leopard Project (private)
Scarborough Sea Life & Marine Sanctuary
Scottish Deer Centre
Screech Owl Sanctuary
Seacombe Aquarium
Sewerby Hall Park & Zoo
Shaldon Wildlife Trust
Shepreth Wildlife Park
Butterfly World, Shrewsbury
Shuttleworth Bird of Prey Centre
Silent World Aquarium
Skegness Natureland Seal Sanctuary
WWT Slimbridge Wetland Centre
South Lakes Wild Animal Park
Southend Sea Life Adventure
Southport Zoo & Conservation Trust
Stapeley Water Gardens - The Palms Tropical Oasis
Suffolk Owl Sanctuary, Stonham Barns
Stratford-upon-Avon Butterfly Farm
Suffolk Wildlife Park - Africa Alive!
Wetlands Animal Park, Sutton-cum-Lound
Swan Pit Nursery
Tarvin Sands Reindeer Centre
Three Owls Bird Sanctuary
Thrigby Hall Wildlife Gardens
Tilgate Park Nature Centre
Todmorden Park
Aqualand, Torquay
Trentham Monkey Forest
Tropical Wings
Tropiquaria
Trotters World of Animals
Twycross Zoo
Blue Reef Tynemouth
Vale Wildlife Visitor Centre
Waddesdon Manor Aviary
Walton Hall Children's Zoo
WWT Washington Wetland Centre
Wellplace Zoo
The Welsh Hawking Centre
The Welsh Mountain Zoo & Botanic Gardens
West Midland Safari & Leisure Park
Weston Park
Weston-Super-Mare SeaQuarium
The Hawk Conservancy, Weyhill
Weymouth Sea Life Adventure Park & Marine Sanctuary
Whipsnade Wild Animal Park
Wigginton Waterfowl Sanctuary
Wildwood
Windsor Safari Park
Wingham Wildlife Park
Woburn Safari Park
Woodside Animal Farm
The Living Rainforest at Wyld Court
Yorkshire Wildlife Park
United States
Las Vegas Zoo
San Diego Zoological Garden
The Secret Garden of Siegfried and Roy, Las Vegas
Shark Reef Aquarium, Las Vegas
