Lima is the capital and largest city of Peru. It is located in the valleys of the Chillón, Rímac and Lurín rivers, in the central coastal part of the country. Riga is the capital and largest city of Latvia. It lies on the Baltic Sea and is home to over 640, 000 people. ACCRA is the capital and largest city of Ghana. It is located on the Gulf of Guinea and is the economic and administrative hub of the country. Oslo is the capital and largest city of Norway. It is located at the head of the Oslofjord and is the economic and governmental centre of the country.