Gniew locates in the northern part of Poland, on the bank of the Vistula River, about 45 km south of Malbork. Gniew is dominated by the Teutonic Knights castle , which was built in the 13th century on a rectangular plan, and later rebuilt in the 16th and 17th centuries. The castle is still surrounded by fragments of the defensive wall. The castle houses a museum, now.
Gniew’s castle hosts numerous cultural events, performances, historical spectacles, ancient music concerts and tournaments. Gniew’s parish church was built in the 14th century; the church interior is mainly Baroque.
Located not far from the castle, Marysienka's Palace was built in the late 17th century. The palace functions as a hotel, now. The Medieval urban layout of Gniew’s old town has been preserved with some buildings from the 15th -19th centuries.