From Wellington to Laurier, Elgin Street is the site of several landmarks, the Château Laurier, the National Arts Centre, Lord Elgin Hotel, Place Bell Canada, the Ottawa Courthouse, and Ottawa City Hall. Other prominent buildings include World Exchange Plaza office and retail complex, encompassing a whole city block on the south-west corner of Queen and Metcalfe, featuring the 'clock ball' on top, and Place de Ville, a complex incorporating four office buildings and two large hotels on two city blocks, with all buildings interconnected through an underground retail concourse. There are also many prominent heritage buildings along Sparks Street.