This chapter addresses the issue of massive waste accumulations resulting from extraction activities, traditionally excluded from rehabilitation processes due to their perceived lack of economic and architectural value. Recently, increased environmental awareness has prompted the consideration of integrating waste materials into quarry rehabilitation. However, current interventions often lack a unified methodology to guide and systematize the adoption of effective criteria. The chapter argues that architectural interventions can significantly enhance quarry and landscape rehabilitation by transforming waste heaps into functional and valuable spaces. Building on the research, this chapter establishes the groundwork for developing a practical reuse methodology to be applied in a case study in Portugal, as detailed in the following chapter. This methodology aims to explore innovative solutions for quarry rehabilitation and the reuse of extraction industry waste. Integrating inert materials into quarry rehabilitation aligns with the principles of circular economy, offering substantial benefits for landscape transformation. Revitalizing abandoned elements of the territory not only impacts the local economy and land management but also contributes to sustainable planetary use. This approach supports and advances the concepts of sustainability and circular economy by providing a new life cycle for neglected components of the landscape.