The IJ-Hallen is Europe's largest flea market, held approximately every three weeks at the outdoor area of the NDSM wharf (spring and summer) or indoors in the NDSM warehouse (fall and winter). Whether you're looking for that perfect pair of vintage sneakers, a new antique wall mirror, a large selection of LP records, or just some fresh additions to your wardrobe, come browse the stalls at NDSM! Click for more information and to book a stall.