Airfields are designated areas where aircraft can take off, land, and be maintained. They can vary in size from small private strips to large commercial airports. Airfields typically include runways, taxiways, and parking areas for planes, as well as facilities for passengers and cargo. Airfields are essential for aviation, supporting both civilian and military operations. They are equipped with navigation aids and safety features to ensure safe flight operations. Some well-known examples of airfields include Heathrow Airport and Los Angeles International Airport, which serve millions of passengers each year.