This is the photo I took a couple of days ago close to the old lighthouse at the mouth of the Douro river, Porto, Portugal. That day the water waves were high, ferocious and ready to kill anyone that dare to enter it. The water was wild hitting the lighthouse strong that day. To the naked human eye it was perceived as the state of absolute chaos. But on a 2 second long exposition photograph long parallel water lines appeared. This phenomenon is due to the physical structure of the H2O molecule which has charged ( positive and negative ) parts. These opposite charges are attracted to each other that holds water molecules together. Date: December 23rd , 2010. Maciek.