Ten great places to visit as the United States' National Park Service celebrates its centenary
By Eveline Harvey
As the USA celebrates the centenary of its National Park Service, we round up some of the country's must-see wilderness sites.
Herald Travel were guests of U.S. Ambassador Mark Gilbert and Brand USA last week for a special IMAX screening of America Wild: National Parks Adventure, a film created to celebrate the 100th anniversary of the United States' National Park Service...