1. The Bridge of Sighs Named after the one in Venice, Oxford’s Bridge of Sighs is arguably more beautiful, and happily lacking in the wretched connotations of that in Venice. 2.  The Natural History Museum Oxford’s answer to London’s Natural History Museum, you’ll find this fun and interactive museum stuffed full of dinosaur bones, fossils and much more.  But its real hidden gem is the Pitt Rivers Museum, the entrance to which can be found at the back of the Natural History Museum.  From shrunken heads to totem poles, this is the most bizarre collection of artifacts you’re likely to find. 3.  The Botantic Gardens A tranquil haven, the Botanic Gardens…