The interactive installation, called The Collectivity Project, contains a fictional cityscape made with more than two tons (1,800 kilograms) of white Lego bricks.

Artist Olafur Eliasson commissioned 10 architecture firms to each create an imaginary structure: James Corner Field Operations, BIG, David M Schwarz Architects, Diller Scofidio + Renfro, OMA New York, Renzo Piano Building Workshop, Robert A.M. Stern Architects, Selldorf Architects, SHoP and Steven Holl Architects.

Members of the public are encouraged to modify the installation, adding blocks to the architect-designed structures, resulting in an ever-changing composition.

Already, the Baobab tree designed by James Corner Field Operations is being dismantled. The spiky spires designed by Bjarke Ingels Group and SHoP Architects aren’t long for this world. Robert A.M. Stern Architects more or less designed a Robert A.M. Stern Architects building, which are always white and blocky. It won’t look that way for long.

Friends of the High Line, the nonprofit organisation that oversees the park’s maintenance and art programme, said: “In the cooperative spirit of the project, these initial buildings will become part of the collective architecture that the public builds over the four months of the project’s installation.”