São Bento Station, Porto, Portugal While the exterior is certainly beautiful—and brings to mind 19th-century Parisian architecture with its mansard roof and stone façade—it is the front hall that will make you gasp. The walls are covered with 20,000 splendid azulejo tin-glazed ceramic tiles, which took 11 years for artist Jorge Colaço to complete.  How to See It: Zero in on the blue and white tile panels, which depict the history of transportation as well as historic battles and artistic…