Northern Karst Belt

A karst is a topographical zone formed by the dissolution of soluble porous rocks, such as limestone, with features such as mogotes, canyons, caves, sinkholes, streams and rivers, all of which are common on this region of the island.

[2] A mogote (English: /məˈɡoʊti/, Spanish: /moˈgote/) is an isolated hill with steep, almost vertical, walls that are completely or partially surrounded by alluvial plains.

[3] These hills are a characteristic feature of northern Puerto Rico and they can be seen along the north coast from Aguadilla and Rincón in the west to Canóvanas in the east.

The highest mogote in the Northern Karst is Cerro El Sombrero in Isabela, Puerto Rico at 1,069 feet (326 m) of elevation.

Highway PR-10 runs from north to south parallelly to the canyon and it provides access to Cueva Ventana, a cave located on one of its cliffs.