On the first and third Sundays of the month , a free two-hour bike tour of the harbor begins at 11 a.m. Antwerp 's Forgotten Harbor It was Antwerp 's renowned fashion designers -- Ann Demeulemeester , Dries van Noten and A. F. Vandevorst -- along with discos like Cafe d'Anvers and the gay club Red & Blue that were the first to move into Het Eilandje -LRB- Little Island -RRB- , a forgotten harbor close to the city center that dates from the 16th century .