Claim: Kingman Lake is an artificial lake located in Washington, D.C., which is the capital of the United States.
Evidence: Kingman Lake is a 110-acre (0.45 km) artificial lake located in the Anacostia River in Washington, D.C., in the United States. Washington, D.C., formally the District of Columbia and also known as D.C. or Washington, is the capital city of the United States of America.