national park
US /ˌnæʃ.ən.əl ˈpɑːrk/
UK /ˌnæʃ.ən.əl ˈpɑːrk/

1.
parque nacional
an area of natural beauty protected by the government for the enjoyment of the general public and the preservation of wildlife.
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Yellowstone is the first national park in the world.
Yellowstone es el primer parque nacional del mundo.
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We spent our vacation hiking in a beautiful national park.
Pasamos nuestras vacaciones haciendo senderismo en un hermoso parque nacional.