Yosemite National Park has four sister parks: China's Huangshan and Jiuzhaigou national parks, Chile's Torres del Paine National Park and Germany's Berchtesgaden National Park. Like Yosemite, all of these parks have mountainous areas that are considered to be of international interest and value and are recognized by UNESCO as World Heritage Sites or Biosphere Reserves.
The sister parks program is an official program of the National Park Service. This program helps rangers, scientists and other officials share knowledge and information about wildlife protection, resource management, habitat protection and public education. Rangers often engage in cultural exchanges, visiting sister parks to gain knowledge and skill. One such trip occurred in 2007, when rangers from China's Jiuzhaigou National Park visited Yosemite for several months.