Research Triangle Park
The Raleigh-Durham area is home to one of the largest research parks in the world, Research Triangle Park. The park was a pioneering model in the 20th century for the sprawling research centers based in suburban corridors. It presently covers 7,000 acres of land and 22.5 million square feet. Over 190 companies and 50,000 employees work in the Research Triangle Park and it hosts some of the largest biotech and pharmaceutical companies in the world, including GlaxoSmithKline and Cisco Systems.