amsterdam architecture blue building city cloud construction holland home house houses Leeuwarden modern road shadows sky street street view The netherlands urban white windows bricks brickwork building-construction building-site building-work buildings cement-mixers construction-site construction-work development elements equipment exterior external framework home-units homes light linear lines materials men metal-work mixers perspectives pipes sand structure style suburban supplies units wall walls work workers workmen abstract backdrop background brown cement cemented color decay design flat gray grunge grungy interior paint painting panel peeled texture yellow purple contrast crane cranes Elbphilharmonie germany hamburg harbour marina maritime mast. masts old philharmonics port quay sailing sailing ships sailingship ship skyline under construction red orange clear cleared fences fencing foundation work foundations groundwork land level levelling levels preparation property ready for building real estate sand pads solid