Belgium’s unique character and two-language culture makes it a must-see destination in Northern Europe.But go beyond Brussels. One of Europe's hidden gems is Belgium's second city.Just up the estuary from the North Sea, Antwerp's historic port became its claim to fame and source of wealth as a trading capital 500 years ago. The port is still the second largest in Europe. The wealth of this great trading city financed great art and artists, the world's oldest stock exchange, and an...