The Verzasca River is a Swiss mountain river, located in Ticino, Switzerland. A 30-km long mountain river, the Verzasca River is known for its crystal-clear waters and stunning array of coloured rocks. A strong treacherous current and cold-water temperatures do not deter tourists from scuba diving in the river; since the river waters are the clearest, providing divers at the bottom of the river with a stunning view to the surface.