Reflected sunlight creates doodles in flowing water
Reflected sunlight creates dancing scribbles on flowing water

The first time I stumbled upon this phenomenon of light scribbles in falling water, I was hooked. The key is finding spots on the water that are getting direct sunlight. A polarizing filter and slow shutter speed do the trick to capture some fanciful scribbles…

Nikon D600, Nikon 24-120mm lens @ 120mm, circular polarizing filter, ISO 400, f/18, 1/8″ exposure.