The Yala National Park has been ranked number six among the world’s best national parks by the acclaimed National Geographic in its recently-published book, 100 Parks, 5000 Ideas by Joe Yogerst, Wildlife Conservation Department Deputy Director (Planning and ICT) Ranjan Marasinghe said.National Geographic’s ‘100 Parks, 5,000 Ideas’ was published in February and its author Joe Yogerst has lived and worked in Asia, Africa, Europe, and North America. Wrangell-St Elias National Park in Alaska, Torres del Paine National Park in Chile, Theodore Roosevelt National Park in North Dakota, Kakadu National Park in Australia and Jasper National Park in Canada are the top five national parks as ranked by Yogerst in this book.