Which national park in the United States is known for its giant sequoia trees?

In which country is the Torres del Paine National Park located? What is the name of the oldest national park in the world? In which country is the Kakadu National Park located? In which country is the Ordesa y Monte Perdido National Park located? What is the name of the world's largest national park? Which nature reserve in Africa is known for its chimpanzees? In which country is the Okavango Delta nature reserve located? The Great Barrier Reef Marine Park is located off the coast of which Australian state?