attention bollard building danger road sign under construction warning city crane London sky architecture concept construction depth dig digging excavate excavating excavation machine power saavem scene street under build cone repair threat transportation warring blue brasil brasilia brazil brick business commerce company glass green modern office trade architectural connections construction site development estate frame framework home house housing Incomplete materials project property real renovation roofing safety net scaf scaffold scaffolding site spikes structure studs undone unfinished clouds coruna dry eu fence galicia grass Hercules nature path Spain tower abutment across bridge bridges cars coastline concrete Denmark double pier piers pillar pillars sea trains underneath water decay face front frontage geometric square traditional urban windows contrast cranes Elbphilharmonie germany hamburg harbour marina maritime mast. masts old philharmonics port quay sailing sailing ships sailingship ship skyline