Brain › GeographyOn a London Underground map, what colour is the Circle Line?YellowRedBlueGreenAnswerThe correct answer is A) Yellow.More Geography questionsThe following Spanish provinces are located in the northern area of Spain except:What is the capital of Greenland?In which English county is the city of Portsmouth?What are the four corner states of the US?Which is the largest of these 4 islands?What is the capital city of Slovenia?Play Brain · Practice