Last weekend of every month at NDSM-Werf. Take the free ferry from Central Station, it's a 10-minute ride.

€5 entry gets you into halls filled with vintage clothing, vinyl records, antique furniture, and random treasures. While Waterlooplein has its charm for regular browsing, IJ-Hallen's monthly format means vendors bring special pieces they've been saving. Bring cash and arrive early — The unique items go fast.