Ключевые слова: abandoned, aerial, air, airfield, airport, army, aviation, background, boarding, business, cement, cloud, communications, concrete, control, day, empty, exterior, field, flight, floor, fly, global, grass, green, ground, heli, helicopter, helipad, heliport, landing place, landscape, lawn, meadow, nature, outdoors, platform, point, practice, residence, rich, secluded, security, sign, sky, station, symbol, tourism, transportation, travel,