Trauttmansdorff was honored as Italy's Most Beautiful Garden in 2005. The complex comprises approximately 12 hectares of gardens, with about 5,800 species of plants and 80 different garden landscapes. The gardens are crossed by paths and waterways, and lined with pavilions. The castle – once the holiday residence of Empress Sissi – has been meticulously restored and complemented by a restaurant and visitor center. In addition to elegant stainless-steel details for bridges, railings and furniture, of particular note are the Aviary and the Viewing Platform. These two modern structures lend the gardens an architectural three-dimensionality. Both represent light yet bold architecture, made of stainless or galvanized steel, and seem to float over the gardens. Visitors access the Viewing Platform across steps that are virtually transparent. The platform towers above the treetops; meanwhile a dizzying bridge high above the gardens protrudes out of the aviary.