A clear day in Berlin, Germany reveals the unique architecture of the city, with its mixed-use buildings, public spaces, and classic European facades. Automobiles, trains, and other forms of public transport provide access to the residential areas and metropolitan districts, which feature a range of street art, from murals to graffiti walls. The skyline is dominated by bridges and viaducts made of metal, concrete, and iron, in a variety of designs, from box girder to arch. With its vibrant human settlements, and a range of vegetation, roads, and other infrastructure, Berlin is a classic urban destination.