sky, old, heritage, salzburg, landmark, historic, town, travel, unesco, tourism, world, site, music, view, tourist, modern, museum, europe, art, cityscape, city, austrian, austria, architecture, alps, attraction, destination, building, concrete, tall, trees, green, gray, force, facility, terrestrial planet, metropolis, united nations educational scientific and cultural organization, traveler, earth, landmass, district, edifice, woody plant, european country, celestial body, globe, plant, united nations agency, urban area, building material, urban center, paving, tree, grey, planet, person, range, historical, Earth