With world-class arts and attractions, and an energetic multicultural population, Antwerp feels as dynamic as New York City. Belgium’s second-largest city attracts 800,000 visitors annually, including 100,000 cruise passengers, yet it’s surprisingly compact. Visitors can cross the center city on foot in a half-hour and traverse the city’s length in an hour. There’s a network of buses and trams, and red bikes can be rented hourly at convenient outdoor stations. As befits a great port city, sightseeing boats like Flandria offer tours along the River Scheldt and in the port, which stretches as far north as the Netherlands.