If Amsterdam is a study in old-world elegance, then the scrappier port city of Rotterdam is all big, futuristic ambition-and its constantly unfolding city center has become one eye-popping explosion of style. The latest attraction, and reason enough to visit, is the MVRDV-designed Markthal, an igloo-like horseshoe that houses 96 stalls (Dutch cheeses to Moroccan spices, reflecting the polyglot city), 20 shops, nine restaurants, and 228 apartments. Lees meer…..