Cleveland, located on the Cuyahoga River and on the shores of Lake Erie, is the largest city in Ohio with an approximate population of 452,208 (2005 U.S. Census). Founded in 1796, it is the Cuyahoga County seat. Cleveland and Pittsburgh share the designation of "most livable cities" from a study conducted and results published in The Economist in 2005. The city grew rapidly with its strategic location and the establishment of railroad and canal access. John D. Rockefeller established Standard Oil and made his fortune here, which boosted Cleveland's economy further and by 1920 it was the fifth largest city in the country.
During the downsizing of U.S. heavy manufacturing, the city began to fall into a period of decline in population and economic opportunities. Businesses have since diversified and expanded with the presence of service-based companies like the Sherwin-Williams Company, Eaton corporation, National City Corporation, Forest City Enterprises and KeyCorp. Along with these enterprises, NASA's Glenn Research Center and Jones Day, one of the largest law firms in the world calls Cleveland home.
Cleveland has also become a world leader in health care and health sciences. The world-famous Cleveland Clinic, the area's largest employer, is one of the highest-ranked hospitals in the United States as tabulated by U.S. News & World Report. Cleveland's health-care industry also includes University Hospitals of Cleveland, a noted competitor of the Clinic's, which is ranked #25 in cancer care. Biotechnology and fuel cell research is being promoted with a partnership with the Cleveland Clinic and University Hospitals of Cleveland being led by Case Western Reserve.
Cleveland is home to the Rock and Roll Hall of Fame and boasts professional baseball and football teams. The area offers a wide range of recreation opportunities with its four parks that encircle the city- known as the "Emerald Necklace," inspired by Fredrick Law Olmstead. Cleveland Metroparks Zoo, located n the Big Creek Valley contains the largest collection of primates in the United States. City residents and visitors also have easy access to Lake Erie at Cleveland Lakefront State Park.