The Kalbario–Patapat Natural Park is a protected area in the Philippines, located on the Patapat Mountains in the municipalities of Pagudpud and Adams in northern Ilocos Norte province. Protected area The natural park was established on April 20, 2007, by Proclamation no. 1275 encompassing with a buffer zone of . The park was created under the National Integrated Protected Areas System (NIPAS) of the Department of Environment and Natural Resources. Patapat Viaduct In the northern section of the park is the Patapat Viaduct, a highway and part of the Pan-Philippine Highway, allowing travel along the sheer cliffs of the northern coastal mountains of Ilocos Norte overlooking the coast of Pasaleng Bay. Part of the viaduct is an elevated highway between the cliffs and shore constructed to solve the problems of landslides during heavy rains causing accidents or closures. See also List of protected areas of the Philippines References Natural parks of the Philippines Geography of Ilocos Norte Tourist attractions in Ilocos Norte Protected areas established in 2007 2007 establishments in the Philippines