Icelandic architects from S APP Architecture envision a revolutionary project to build sustainable cities by harnessing volcanic lava. Their “Lava Forming” concept involves controlling lava flow and cooling processes to create building materials like walls, pillars, and insulation. Inspired by Iceland’s active volcanoes, the project explores methods including lava channels, future 3D printing robots, and underground magma chambers. Though still experimental, this approach could reduce carbon emissions and transform hazardous lava into a renewable resource for construction in volcanic regions worldwide.