Sedgwick Museum of Earth Sciences

Cambridge University's oldest museum, free to enter on Downing Street. The collection spans 4.5 billion years: a complete iguanodon skeleton replica (gifted by the King of Belgium in 1896), a T-Rex skull cast, a giant Megaloceros deer, ammonites the size of cartwheels and thousands of sparkling mineral specimens. Regular fossil-handling and rock-ID sessions for all ages.