Cité des Sciences et de l'Industrie

The Cité des Sciences sprawls across five floors in what used to be an auction house for cattle, and honestly, it shows-the layout can be confusing. The permanent exhibitions vary wildly in quality: the space section with its Soyuz capsule replica is genuinely impressive, while the mathematics area feels dated with clunky interactive displays from the 2000s. The real draw is the children's areas, which are thoughtfully designed with water play stations, construction zones, and surprisingly sophisticated exhibits about light and sound.

Your visit will involve a lot of walking and waiting. The building feels industrial and cold, with long corridors connecting different exhibition spaces. Crowds funnel through narrow passages between displays, and popular interactive stations often have queues. The Géode theater is striking from outside, but the IMAX films rotate frequently-check what's playing before paying extra. Weekend afternoons turn chaotic with school groups and families.

Skip the temporary exhibitions unless the topic genuinely interests you-they're often overpriced add-ons. The submarine Argonaute outside is underwhelming for the separate admission fee. Focus your time on one or two sections rather than rushing through everything. If you have teenagers, they'll likely find most exhibits too childish or too academic, making this genuinely better for families with younger kids despite its reputation as a general science museum.