In Hinwil, in the Zürcher Oberland, I asked friends about their favorite spot in the vicinity of Bachtel. Without exception, they spoke of "their" waterfall from childhood. I followed these places and documented these waterfalls photographically over several months. After thunderstorms, floods, or during summer dry spells. Then I changed my focus and ventured into the night, phenomenologically exploring the mystery of twilight. It is the combination of many small components that allows for these images of twilight. A cold wind must blow, the moon should shine, and it should rain and storm at the same time. The falling water must be very cold. However, even if all conditions are met, there is no guarantee that the lights will appear. The duration of their appearance does not exceed 15 minutes. For this book.