The.Riverwave is a state-of-the-art adjustable artificial river wave on the Traun river near Marchtrenk, Austria, built around a hydraulic shield that dials the wave up or down as the river's flow shifts. Water diverts through a side channel into the wave structure and rejoins the Traun just downstream, so it keeps delivering a clean, surfable face no matter what the river itself is doing that day. At roughly ten meters wide and up to a meter and a half tall, there's plenty of face for newer surfers and anyone looking to push harder turns. It runs year-round, making it one of the more reliable sessions in the Austrian surf scene regardless of season.