Brasília National Park

The Brasília National Park, also known as Água Mineral, is a national park located in the northwest of the Federal District and in the center of the state of Goiás, in the Brazil. The park covers an area of 423.83 square kilometres, with territory distributed by the administrative regions of Brazlândia, Brasília and Sobradinho, in the Federal District and by the municipality of Padre Bernardo, in Goiás. It is administered by the Chico Mendes Institute for Biodiversity Conservation. It is the largest park in an urbanized area in the world.

Source: Wikipedia