Museum of Illusions - Manchester

You'll spend a good hour wandering through rooms that mess with your head in the best possible way. The infinity room makes you feel like you're floating in space, while the Ames room will have you appearing giant next to your suddenly tiny mate. It's properly interactive – not just look-don't-touch museum stuff. The hologram exhibits are genuinely impressive, and the upside-down room creates photos that'll confuse your followers for weeks. Yes, it's touristy, but it's the kind of place that works whether you're entertaining visiting family or just fancy doing something different on a rainy Tuesday. The staff actually know how to work the exhibits properly and will help you nail those tricky shots.