North of the Cordillera is the karst country where the limestone has been acted upon by water to produce a series of small steep hills and deep holes, both conical in shape.

• 山脉的北部是岩溶地区，那里石灰石在水的作用下缔造了一系列陡峭的小山和深邃的洞穴，两者在形状上都呈圆锥形。