Anon is home to some of Puerto Rico's highest peaks. The highest point in Barrio Anon is Cerro de Punta which, at 4,390 feet, is also the highest point in Puerto Rico. Monte Jayuya is the barrio's second highest point at 4,300 feet. Barrio Anón is also home to the origin of the Anón and Inabón rivers. Rio Anón feeds into Rio Inabon within the boundaries of Barrio Anón to eventually empty as Rio Inabon into the Caribbean opposite Caja de Muertos. Rio Blanco and Rio Prieto are two other important rivers in Barrio Anón. Anon is also home to the Toro Negro State Forest; some 40% of the area of Toro Negro is located in Barrio Anon.