Grantchester is a village two miles south of Cambridge, reachable by the footpath along the Cam from Newnham (about 45 minutes' walk) or by punt from Scudamore's at Granta Place (roughly 90 minutes each way). It is famously associated with Rupert Brooke, who lived there as a student and immortalised it in his 1912 poem "The Old Vicarage, Grantchester."
The Orchard Tea Garden, which has been serving tea and scones in its apple orchard since 1897, is the destination most visitors aim for — Rupert Brooke ate here, as did Virginia Woolf, Bertrand Russell, and E.M. Forster. On a warm afternoon, punting upstream and mooring at the Orchard is the closest thing Cambridge has to a perfect day out.