4. The Natural History Museum
Founded in 1881, the Natural History Museum is one of the most fascinating and prestigious science museums in the world. Exhibits can be seen that explore aspects of botany, entomology, mineralogy, paleontology, and zoology. The museum is famous for its dinosaur collection, especially the Diplodocus skeleton, and the animatronic T-rex is a favorite as well. In addition to its large section devoted to mammals including a fantastic model blue whale, the museum boasts the enormous Darwin Centre, which hosts over 22 million species of insects and plants. In addition, visitors can peek into laboratories and watch real scientists at work and engage in many interactive exhibits all without paying a single cent.