Oxford was built on the site of a Ford (a part of the river shallow enough to be waded through) used by oxen. Cambridge was built on the site of a bridge on the River Cam.
Oxford
The first Oxford and Cambridge boat race happened 157 years ago
The boatrace.
Cambridge was established in 1209 by a bunch of scholars who left Oxford.
Oxford-Cambridge Boat-Race - 1899 was released on: USA: April 1899
Oxford and Cambridge Boat Race - 1908 I was released on: USA: May 1908
You can take the X5 from the Glouchester Green bus station in Oxford and it'll take you to Cambridge. It's about 2.5 or so hours.
Cambridge
The University of Oxford and the University of Cambridge. Along with the universities, both are large cities with tourist attractions, shopping, restaurants etc.
Everyone will have a different opinion on this. I personally prefer Oxford, but only because that is where I live How right you are - I am a Cambridge man myself!
Oxford and Cambridge University
At Mortlake