There's a strange little attraction hiding in plain sight inside Westfield London in Shepherd's Bush: Prison Island, an indoor challenge arena where teams race around cell-themed rooms racking up points. The idea is simple — you get a team, a set amount of time, and a grid of cells, each holding a different physical or mental test. Think balance beams, reaction pads, memory puzzles and laser-grid-style agility games, all against the clock.

Unlike an escape room, nothing here requires you to solve one big puzzle to get out. You wander freely between cells, and each one scores you points if you complete its challenge. It suits mixed groups — families with older kids, birthday parties, work outings — because the difficulty ranges from genuinely sweaty to pure brain-teaser. You can split up, regroup and chase a high score rather than a single solution.

The location is half the appeal. Westfield London is one of Europe's biggest shopping centres, with the Shepherd's Bush Overground and Central line stations on its doorstep. That makes Prison Island an easy rainy-day fallback or a way to bribe your group with food and shopping before or after. It slots into the same family of competitive social venues that have taken over London — axe throwing, mini golf, darts and the rest — but with a more kid-friendly, activity-heavy flavour than most.

Sessions are booked in time slots, and pricing typically runs cheaper per person the larger your team, so it rewards dragging along a full crew. Comfortable clothes and trainers are a must; a decent chunk of the cells are physical. If you're planning a group visit, booking ahead online is wise, especially on weekends and school holidays when the centre is heaving.

For travellers with kids in tow, or anyone in west London with an afternoon to kill and no interest in another museum, it's a solid, low-effort pick: turn up, split into teams, and let whoever loses buy the drinks at the food court.