""Hidden City Secrets"" explores the captivating world beneath our feet, revealing the hidden tunnels, forgotten subway stations, and concealed spaces that exist just beneath the surface of iconic cities. This journey into subterranean exploration unearths the historical, architectural, and social narratives etched into these urban undergrounds. Learn about the evolution of infrastructure networks, from ancient aqueducts to Cold War bomb shelters, and discover how these spaces reflect the changing needs and priorities of city dwellers. The book presents a unique and tangible connection to urban history, offering insights into the ingenuity, aspirations, and fears of past generations. Structured in three parts, ""Hidden City Secrets"" first introduces the concept of the ""hidden city,"" then delves into specific types of hidden spaces like abandoned transportation systems and shelter spaces, using case studies from cities worldwide. Finally, it examines the modern-day relevance of these hidden spaces, exploring preservation efforts and their impact on urban planning.