The highest point is the 4,450 m high Cerro Arquitectos (Architects Hill), and the elevation of roads reaches higher than 4,310 meters (13,550 feet). About 270 lakes and lagoons are present in the páramo of Cajas. Luspa is the largest of these lake and extends over 78 hectares with a maximum depth of 68 m at a perimeter of 5,161 m. Like the other lakes it is of glacial origin, and glaciation shaped the landscape of Cajas leaving U-shaped valleys and ravines. Cajas provides about 60% of the drinking water for the Cuenca area. Two of the four rivers of Cuenca originate from Cajas, the Tomebamba and Yanuncay rivers which eventually drain into the Amazon river. The Paute river also links to the Amazon. As the park straddles the continental divide, its western drainage, the Balao and Cañar link to the Pacific ocean.