sound insulation wall made of a steal grid filled with soil at the anne frankhove in the south-holland village of sassenheim

anne apartement architecture block blue building city construction design dutch environment europe facade filled frame frank frankhove frontage glass grass green grid holland house housing insulation isolated isolation living made modern netherlands outdoor protect protection sassenheim silence silend sky soil sound southholland steal street structure technology teylingen teylingerhof tulip urban village wall window