Rincón de la Vieja Volcano National Park, in Spanish Parque Nacional Volcán Rincón de la Vieja, is a National Park in Guanacaste Province of the northwestern part of Costa Rica. It encompasses the Rincón de la Vieja and Santa María volcanoes, as well as the dormant Cerro Von Seebach. The last eruption here was by Rincón de la Vieja in 1998. It is part of the Guanacaste Conservation Area and the Area de Conservación Guanacaste World Heritage Site