One of your first stops should be Round Church Visitor Centre. Here, you'll be able to find your bearings and get some great ideas before you set out exploring.
You'll find this tourist information center in Cambridge City Centre. If you're watching your budget, you'll be pleased to know entry is free. When you've finished exploring Round Church Visitor Centre, look up some attractions nearby. Church of St Mary the Great, Sedgwick Museum of Earth Sciences and Cambridge Corn Exchange are traveler favorites.