- K2 Crawley
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- Kart Kingdom - Indoor GoKart Track
- Karts of London
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- Kayak King Tours
- Kedi Studio
- Kedleston Hall
- Keighley & Worth Valley Railway
- Kelburn Castle and Estate
- Kelham Island Museum
- Kelmscott Manor
- Kelsey Park and Minigolf Course
- Kelvedon Hatch Nuclear Bunker
- Kelvingrove Art Gallery and Museum
- Kempston Outdoor Centre
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- Kempton Park Fireworks
- KendalWall Indoor Climbing Centre
- Kenilworth Castle
- Kennack Sands
- Kennet Horse Boat Company
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- Kent & East Sussex Railway
- Kentish Town City Farm
- Kent Life
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- Kents Cavern
- Kentwell Hall
- Kentwell Hall and Gardens
- Kenward Place
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- Kerr's Miniature Railway
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- Kew Gardens
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- Keypitts Quads
- Kia Ora Minifarm
- Kick Up The Arts Melton
- KickX Football
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- Kids2day Indoor Soft Play Centre
- Kids Club House Ltd
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- Kids Complex
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- Kidsgrove Ski Centre
- Kids Kingdom
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- Kids Play Cafe
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- Kids Play Kettering
- kids stop
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- Kids Zone
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- Kidz About Adventure Play
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- KIDZ BOP Live
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- Kidz Fantasy Land
- KIDZ FUN PLACE
- Kidzkaboom playcentre and nursery
- Kidzmania
- KidZone Play Centre
- Kidz Planet
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- Kidz Play Cafe
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- Kidz Play Indoor Play Centre
- KIDZ TOWN Role-Play Centre
- Kidzworld
- Kielder Art and Architecture
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- Kielder Observatory
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- Kielder Water Bird of Prey Centre
- Kiftsgate Court Gardens
- Kikiland
- KiKis Kabin
- Kildare Maze
- Kilduff Farm Pumpkin Festival 2023
- Kilkee Waterworld
- Kilkenny Castle
- Kilkenny Way Hurling Experience
- Killarney Falconry
- Killarney National Park
- Killerton
- Killhope Lead Mining Museum
- Killruddery House
- Kilmartin House Museum
- Kilnwood Studio
- Kilnworx Climbing Centre
- Kiloran Beach
- Kiltartan Gregory Museum
- Kiltimagh Pet Farm and Wildlife Park
- Kilve Beach
- Kimmeridge Bay
- Kinder, Edale and the Dark Peak
- Kinderland Play Centre
- Kinema In The Woods
- King Alfred Leisure Centre
- King Arthurs Labyrinth
- Kingdom Come
- Kingdom Falconry
- Kingfisher Leisure Centre Sudbury
- Kingfisher River Cruises
- King Georges Playing Fields
- King House
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- King Pins Bowling
- King Richard III Visitor Centre
- Kings18
- Kingsbarns Beach
- Kingsbury Water Park
- Kings College Chapel
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- Kings Hall Leisure Centre
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- Kings Road Playground
- Kingstanding Leisure Centre
- Kingsteignton Swimming Pool
- Kingston Lacy
- Kingston Maurward Gardens & Animal Park
- Kingston upon Thames Spy Mission Treasure Trail
- Kingsway Cambridge
- Kingsway Royston
- Kingswood Heritage Museum
- Kinmel Bay
- Kinsmen Activity Centre
- Kippure Adventure Centre
- Kippys Paint Your Own Pottery
- Kirbuster Museum
- Kirkburton Pottery Barn
- Kirkleatham Owl Centre
- Kirk Michael Beach
- Kirkstall Abbey
- Kirky Picture Palace
- Kirroughtree Visitor Centre
- Kissane Sheep Farm
- Kitchen Coos & Ewes
- Kittea Cakes cat cafe
- Kitty Cafe Leeds
- Kitty Cafe Nottingham
- Kixx Redditch
- Knaresborough Castle
- Knaresborough Pool
- Knaresborough Spy Mission Treasure Trail
- Knebworth House and Gardens
- Knettishall Heath Country Park
- Knightly's Amusements Virtual Reality Arena
- Knightly's Fun Park
- Knightshayes
- Knockhatch Adventure Park
- Knockhatch Ski & Snowboard Centre
- Knockhill Racing Circuit
- Knowsley Safari Park
- Kooca
- Krafty Koala Pottery Cafe
- Krafty Shed
- Krazy Kids Adventure World
- Krazy Kingdom
- Krazy Krocs Play Centre
- Kris Cruisers
- Kylemore Abbey
- Kylemore Karting
- Kynance Cove
- Kynren