This temple to the sciences – 5 floors covering 5ha in all – is remarkable for the richness of its collections, and for the methods it employs to engage visitors, through its exhibits, interactive displays and experiments. If pushed for time – and remember, a whole day is not enough to see everyting – be aware that the Synopsis Gallery provides a vivid presentation of the museum’s highlights. The aeronautical exhibits on the third floor are also worth seeking out.