 Geographically, the CBD is situated towards the western edge of the built-up area, as the terrain to the east was more suitable for development of the expanding city than the high slopes of Mount Kigali to the west.Several of Rwanda's highest buildings, including the twenty-storey Kigali City Tower, are located in the CBD, as are the headquarters of the country's largest banks and businesses.Other buildings in the CBD include the upmarket Serena, Marriott and Mille Collines hotels, the University Teaching Hospital of Kigali, the national university's College of Science and Technology, and government buildings such as the National Bank of Rwanda and the Ministry of Finance and Economic Planning.