- UA Trampoline Park
- Uber Boat by Thames Clipper
- Uckfield Leisure Centre
- Ufton Fields Nature Reserve
- Uist Community Riding School
- Ullswater Steamers
- Ulster American Folk Park
- Ulster Folk and Transport Museum
- Ulster Museum at Botanic Gardens
- Ultimate Activity Camps
- Ultimate Adventure
- Ultimate Slip 'N' Slide
- Ultimate Warriors
- Umberslade Adventure
- Umberslade Estate
- Uncle Henry's Farm Shop, Behind the Garden Wall
- Uncle Jack’s Halloween Magic & Craft Show!
- Under 1 Roof
- Underbank Activity Centre
- Unicorn Theatre
- Unit 23 Skatepark
- Unit3sixty Indoor Skatepark
- Universal Studios UK
- University of Bristol Botanic Gardens
- University of Dundee Botanic Garden
- Unst Boat Haven
- U Paint It Pots
- Up at The O2
- Upchurch River Valley Golf
- Uphill Slipway Beach
- Uppark House and Gardens
- Uppermill Spy Mission Treasure Trail
- Upside Down House Brighton
- Upside Down House Bristol
- Upside Down House Cardiff
- Upside Down House - Liverpool
- Upside Down House Metrocentre
- Upside Down House Westfield White City
- Upton Country Park
- Upton House and Gardens
- Urban Battlefields
- Urban Bird Walk London
- Urban Jump
- Urban Xtreme
- Urquhart Castle
- Usk Rural Life Museum
- Uttoxeter Leisure Centre