London has plenty of museums where you look at things behind glass. The Paradox Museum, a short hop from Oxford Street, is the opposite: you climb inside the exhibits and become part of them.

The concept is simple. Around 70 hands-on optical illusions and interactive rooms play with perspective, light and your sense of balance. Walk on the ceiling in an upside-down room, shrink and grow in an Ames-style tilted room, lose yourself in an infinity mirror maze, and get the classic shot of your friends dangling off a ledge thanks to a cleverly rotated set. Staff are on hand to show you the best angles, which matters more than you'd think — half the fun is nailing the photo that makes no sense on camera.

It sits on Torso Court, just off the top of Oxford Street, so it slots neatly into a central London day out alongside shopping, Soho or a walk up to Regent Street. Sessions run on timed entry tickets, which keeps the rooms from getting crushed even at busy periods, and you can book online in advance — worth doing on weekends and school holidays when walk-in slots disappear fast.

Most people spend around an hour inside, which makes it less of a full-day commitment and more of a punchy activity: rainy-day filler, a birthday treat, or something to do with teenagers who claim they've seen everything London has to offer. It's especially popular with families and anyone chasing a new profile picture, but there's genuine wonder in the illusions even if you never take a single photo.

Why it matters for travellers: it's an indoor, centrally located, all-weather option that's easy to bolt onto any itinerary, and it fills the gap between the big free museums and the pricey West End shows. If you're travelling with kids, this is one of those rare attractions that entertains a six-year-old and a sixteen-year-old at the same time. Book a midweek afternoon slot for the quietest rooms and the easiest photos.

Story via Secret London.