One of attractions in Cambridge that you have to see is Cambridge University Botanical Garden.
I went to the Garden even in winter and the view is amazing. (Must be very pretty in summer)
The garden lies between Trumpington Road and Hills Road, close to Cambridge station. Here, you can discover plants from all over the world in 40 acres of beautiful gardens and glasshouses. I think the best way to see the garden is by gondola. By doing punting, you cross the river and see the best spots around Cambridge.