Geographically, Canzo is roughly the centre of the Larian peninsula (or Lake Como Triangle). The land lies between the two ramifications of Lake Como. One leads to Como and one goes straight south and, within the boundaries of Lecco, transforms itself into the second part of the Adda River. The third side of the triangle consists of many small lakes, of which Lake Segrino is smallest. The mountains of the triangle are pre-Alpine, topped by Mount San Primo at 1,686 m.