The University of Oxford is not a campus university - there is no entrance to a campus; the various colleges that comprise the University are scattered around the old city. Each has its own history and traditions. The list of Oxford colleges (with associated websites) can be found here with information about visiting them here.
One particularly interesting college is Christ Church; it is the largest college of Oxford University, founded in 1546 by Henry VIII. It is the only college in the world with a cathedral within its walls. More recently the college has become famous for being used in the making of the first two Harry Potter films. When you enter Oxford, the first college you meet is Magdalen College (see right).
The University of Oxford has its own website. One of the most important parts of the University is the Bodleian Library, which includes the oldest teaching room in Oxford University and literally millions of books (as it is a receiving library - publishers by law have to deposit a copy of any new publication with them).
Other parts of the University include the famous Botanic Gardens (historically the place where plants would be grown for creating medicines) and its own shop.
ation about visiting them 
lege in the world with a cathedral within its walls. More recently the college has become famous for being used in the making of the first two Harry Potter films. When you enter Oxford, the first college you meet is Magdalen College (see right).