bridge cantilever cross crossing Edinburgh engineering estuary Forth girder girders iron metal rail railway river scotland scottish ship tanker train trains water blue camera cctv crime egypt egyptian juxtapose juxtaposition observation observe ornate Pharaoh security sky sphinx statue stone surveillance theft watch watching architecture classic door entrance fence georgian grass green house new town railings square steps stones town townhouse tree trees window foreground mesh barge build building cassion concrete construction crane dam Firth landmark road span steel suspension tall tower