Natural History Museum
As well as the permanent (and permanently fascinating!) dinosaur exhibition, the Natural History Museum boasts a collection of the biggest, tallest and rarest animals in the world. See a life-sized blue whale, a 40-million-year-old spider, and the beautiful Central Hall. Entry is free but special exhibitions require tickets.
From the future of space travel to asking that difficult question: "who am I?” the Science Museum makes your brain perform Olympic-standard mental gymnastics. See, touch and experience the major scientific advances of the last 300 years; and don't forget the awesome IMAX cinema. Entry is free but some exhibitions require tickets.
Victoria and Albert Museum
The V&A celebrates art and design with 3,000 years' worth of amazing artefacts from around the world. A real treasure trove of goodies, you never know what you'll discover next: furniture, paintings, sculpture, metalwork and textiles; the list goes on and on… Entry is free but special exhibitions require you to purchase tickets.