For the exhibition Solid Transitions anima ona was invited as one of 14 artists to react to one of the largest inner-city construction sites in Europe: Stuttgart 21. To question its significance and explore the potential of its architectural dimensions. In the sequence of collecting, documenting, digitizing, archiving and recycling, we wanted to give new value to excavated earth from the construction site for the exhibition. We transformed the excavated earth and transformed it into geopolymers, a material that is being researched as a sustainable alternative to concrete, and applied as plaster on a base material. In the form of a 13.8 m long wall relief, this material experiment presents itself as a contrasting painting in the middle of a concrete landscape and emphasizes the aesthetic qualities and design potential of this sustainable building material.