Gauja National Park is in northeast Latvia. It's known for its many historical structures. Covering a large swath of the Gauja Valley, it surrounds the town of Cēsis and its 13th-century castle. Medieval Turaida Castle, with its tall tower, anchors the Turaida Museum Reserve. Also here is Folk Song Park, with granite sculptures inspired by Latvian folklore. South, Sigulda town has a ruined Livonian Order castle.