I took todays picture in September 2004, when I was living next to the Näsijärvi lake, in Rauhaniemi, Tampere. The lake is very long (ca 40 km of continuous open water and the width is over 10 km at its widest. The rock you see in the picture is granite, the nethermost rock you can see on earth. It's one of the oldest rocks on earth. Of course even granite weathers and changes shape, but it is much harder than the limestone prevalent elsewhere in Europe.
The smooth water was created by shooting a six minute exposure, which calmed the water, creating an ethereal haze on the lake. I must have taken hundreds, if not thousands of photos by the lake.