The building of the original Peat and Sulphur Baths was the youngest structure within the complex, yet it was found in the most advanced state of deterioration. During the renovation, the perimeter walls were stripped back to the bare masonry and the building was left in its raw state.

Today it serves as a space for exhibitions, concerts and other cultural events. At the same time, glazed roofing has been added, allowing it to function as a winter shelter for heat-loving plants from the spa grounds. Hence the new name: the Greenhouse.