The largest city in a country always seems to garner the most attention - and the vast majority of visitors. However, it takes a traveler with a slightly different agenda to pass these cities by and head for the "second cities". Maybe you've already fought the crowds to see the Mona Lisa at the Louvre in Paris, stood in line to gain entrance to the Colosseum in Rome, or spent a day wandering around the food stalls at Harrod's in London…