Lively Antwerp is a hidden gem. Its medieval streets, Renaissance monuments and vibrant nightlife tend to be overshadowed by its reputation as center of the diamond trade and as the world's fifth-largest port. Biking is a popular choice for getting around this stylish Flemish city. See thousands of Old Masters at the Royal Museum and Rubens House. Experience the bustle of life at the Grote Markt. Marvel at the art and architecture of the still unfinished Cathedral of Our Lady, started in 1351.