The Bridge of Sighs:
Locals say it is so named as students sigh after taking exams at St. John’s College.
There are more than 25 bridges over the River Cam in Cambridge, England.
The Mathematical Bridge:
The Mathematical Bridge is the popular name of a wooden bridge across the River Cam between two parts of Queen’s College. Its official name is simply the Wooden Bridge.
The bridge was designed by William Etheridge , and built by James Essex in 1749. It has been rebuilt on two occasions, in 1866 and in 1905, but has kept the same overall design.
The arrangement of timbers is a series of tangents that describe the arc of the bridge, with radial members to tie the tangents together and triangulate the structure, making it rigid and self supporting.