30 national parks you need to visit outside the U.S.

Although the United States established the first national park in 1872, countries throughout the world have designated areas to protect and preserve. iReporters shared photos of the best national parks they've visited across the globe. The <a href='http://ireport.cnn.com/docs/DOC-1127448'>Iguazu Falls </a>of Argentina's <a href='http://www.iguazuturismo.gov.ar/index_i.php' target='_blank'>Iguazu National Park </a>are surrounded by subtropical jungle. Across the Iguazu River, you'll find the Brazilian counterpart of this national park.

Although the United States established the first national park in 1872, countries throughout the world have designated areas to protect and preserve. iReporters shared photos of the best national parks they've visited across the globe. The Iguazu Falls of Argentina's Iguazu National Park are surrounded by subtropical jungle. Across the Iguazu River, you'll find the Brazilian counterpart of this national park.