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Palo Verde National Park
This remote sanctuary for neotropical birds is located at the mouth of the murky [Tempisque River](/costa-rica/attractions/tempisque-river-river) where the sluggish waterway pushes sediment into the Gulf of Nicoya (Gulfo de Nicoya). A vast network of mangrove-rich swamp, lagoons, marshes, grassland, limestone outcrops, and forests comprise the 32,266 acre (13,058 ha) Palo Verde National Park. Flanking the [Dr Rafael Lucas Rodriguez Caballero Wildlife Refuge and the Lomas Barbudal Biological Refuge](https://www.anywhere.com/costa-rica/attractions/lomas-barbudal-biological-reserve) to the south, the three parks encompass similar habitats that form the Tempisque Conservation Area (Area Conservacion Tempisque), along with [Barra Honda National Park](/costa-rica/attractions/barra-honda-national-park).