Nacunday National Park, National park in Alto Paraná, Paraguay

Nacunday National Park is a protected area in eastern Paraguay, in the Alto Paraná department, near the town of Ñacunday. The park is made up of dense forest along the Alto Paraná river and features several waterfalls, including the main drop known as Salto Ñacunday.

The area was protected by Decree No. 17,071 of 20 August 1975 as Bosque Protector Ñacunday, covering 1,000 hectares and including Salto Ñacunday. Decree No. 16,146 of 18 January 1993 repealed that decree and created the 2,000-hectare Ñacunday National Park, replacing both the Ñacunday and Yacuy protector forests.

Mbya Guaraní communities live near the park and have long maintained a close relationship with this forest. Their knowledge of the land shapes how people around the park relate to nature today.

There is no tourist program at the park, so facilities and marked trails should not be expected. Access from Ciudad del Este is about 90 km: Route 2, then a paved road toward Los Cedrales that turns into a dirt road. Route 6, linking Ciudad del Este and Encarnación, offers another approach. The dirt stretch can be difficult in the rainy season.

The island beneath Salto Ñacunday formed from logs of trees that fell over the precipice and piled up there over time. The Mbyá Guaraní living inside the park draw water from the Ñacunday River for their daily activities, and the river is occasionally used for recreation.