Expect a quirky, low-tech Victorian experience: you climb to the top of a tower where a guide uses a giant mirror and lens to project a live, moving image of the city outside onto a big white table. It's surprisingly clear and fun to watch rooftops, people, and traffic all appear upside-down and backwards. The rest of the building is filled with optical illusions, holograms, and hands-on exhibits across several floors. The whole thing takes 60-90 minutes depending on how long you linger at the illusions. It's genuinely entertaining for kids and adults who like simple science tricks, but it's not a profound historical deep-dive.
Go in summer (May-August) if you can; the longer daylight hours mean a brighter, sharper projection. Expect to pay around £15-20 per adult, with discounts for kids and families. It's popular so book ahead in peak season or you'll queue. One solid tip: head straight up to the camera obscura show first (they run every 15-20 minutes), then wander down through the illusions at your own pace. Skip the overpriced gift shop on the ground floor unless you really need a fridge magnet.
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