Editorial photo #13906740 Human Interest
15th Water Critical Mass In Krakow
Participants of the 15th Water Critical Mass navigate the Vistula River in their own structures in Krakow, Poland, on June 21, 2026. Water Critical Mass is a cyclical event where participants construct their own boats, rafts, and kayaks, and then navigate their colorful vessels down the Vistula River. (Photo by Klaudia Radecka/NurPhoto)
