The Bridge of Sighs is one of Cambridge's main tourist attractions. It is part of St John's College, Cambridge and is named after the Ponte dei Sospiri in Venice.

The Mathematical Bridge, part of Queens' College, Cambridge, is perhaps the most intriguing of the bridges across the Cam. At a quick glance, this wooden bridge looks as though it has the classic curved shape. But if you check carefully you will see that it is constructed of straight timbers -- technically known as tangent and radial trussing.

Garrett Hostel is the most boringly functional of the four Cambridge bridges listed here: it lies between Trinity College and Trinity Hall (two Cambridge colleges) and is for pedestrians and cyclists.

Magdalen Bridge is not in Cambridge. It crosses the divided stream of the River Cherwell just to the east of the City of Oxford, and is next to Magdalen College, Oxford.

More Info: en.wikipedia.org