The Best Sight in The Latin Quarter, Paris

Unless your French is good enough to justify joining a 90-minute group tour (€15, by online reservation only when on offer), you can't get into the city's most famous university without a student ID—but it's still fun to hang out with the young scholars. Although La Sorbonne remains the soul of the Quartier Latin, it is only one of several campuses that make up the public Université de Paris.