This chapter underscores the meaning of the “landscape” in encouraging heightened attention toward it. Over centuries, the perception of nature has evolved from a peripheral background to a central subject of artistic and architectural interest, particularly with the advent of land art, which directly modifies landscapes with large installations that highlight the landscape as a primary subject of creative expression. The chapter introduces various disciplines related to the landscape, providing concise theories to demonstrate its versatility across different fields. It begins with a historical and pictorial perspective, examines key regulations, and explores the landscape’s imaginary, cultural, social, and aesthetic dimensions. The chapter also addresses the impact of industrial modernity on natural territories, introducing concepts such as “Drosscape,” “Friche,” and “Terrain Vague” which these terms describe landscapes marked by industrial waste and abandonment, which, while often seen as burdens, hold potential for reuse and redevelopment. The focus is on redeveloping these devastated areas through recycling and reusing residual materials. The chapter analyzes the concept of “reuse” to recover existing environmental values and eliminate waste and describes several case studies and methodologies for requalifying industrial sites.