Ключевые слова: activity, adult, aircraft, airliner, airplane, airplanes, airport, architecture, arrival, aviation, background, building, bulgarian, business, city, concept, crowded, departure, destination, flight, gate, hall, holiday, international, journey, lifestyle, modern, passenger, public, room, sofia, sofia airport, standing, street, terminal, tourism, tourist, transport, transportation, travel, traveler, travelers, trip, urban, vacation, view, waiting, window,