Later in the 1980s and 1990s, Pepper made works such as "Cromlech Glen" (restored in 2003), "Palengenesis" (1993-94) and "Sol i Ombra", (1987-92). The works blend nature with industrial materials, as well as inviting the viewer to be a part of the work —"a total environment." "Palengenesis" exhibits her fascination with cast iron during this period. Barbara Rose explains "The theme of "Palengenesis" is of one element born from another, expressed by a sequence of vertical elements that gradually separate from a wall that generates them. The vertical elements progressively become detached from their context as children individualize themselves from a parent. These themes of genesis and continuity are central to Pepper's iconography." In the Barcelona park, "Sol I Ombra", the reflective seductive stainless steel of her earlier works morphed into a ceramic structure, "Cel Caigut". Rose suggests "Cel Caigut is content–specific as well as site-specific. In an homage to Gaudi, the great turn-of-the-century Catalan architect, Pepper covered the earth mound with shimmering ceramic tile, the material Gaudi used in his famous Park Guell."