The Ponte Dai Salti (very old stone bridge) crosses the Verzasca river in the Italian part of Switzerland (Ticino).
The pictures were taken with a DJI Phantom 3 Advanced; most of them from a low altitude. The water is ice cold and one could not stand in it for a very long time – at least not around this time of the year. However, I was able to take the shots from just above the water thanks to my DJI drone 😉