On a remote slope along the eastern edge of São Miguel Island, hidden in plain sight, stands the largest natural wall in the Iberian Peninsula—an imposing yet almost imperceptible structure, seamlessly woven into the landscape it protects. More than an engineering feat, it is a testament to a quiet revolution underway in the Azores: the rise of nature-based solutions as both philosophy and practice.

Developed by the SPEA Açores, this approach draws on what experts call “natural engineering”—the application of ecological processes to solve structural and environmental challenges. Instead of relying solely on concrete and rigid infrastructure, these methods harness the stabilizing power of vegetation, soil, and water systems to create solutions that are not only effective but regenerative.

The results are striking. In steep volcanic terrain prone to landslides and erosion, the organization has constructed living structures—using logs, native plants, and carefully designed drainage systems—that can retain hundreds of tons of earth while allowing water to flow naturally through them. Unlike traditional бетон walls, these “living walls” adapt, regenerate, and integrate into the ecosystem, reducing long-term risk while enhancing biodiversity.

Since pioneering these techniques in the Azores over a decade ago, SPEA has expanded their application beyond slope stabilization. Rivers have been restored, with more than three kilometers of waterways rehabilitated under regional conservation efforts, while sensitive areas such as the Lagoa do Congro and key water sources in Vila Franca do Campo have benefited from ecological recovery projects.

Equally significant is the work being done to mitigate the growing impact of tourism. In fragile highland environments, where thousands of visitors can erode trails and destroy native vegetation, simple but effective interventions—raised paths, improved drainage, and low-impact design—are helping guide movement while preserving the integrity of protected landscapes.

What makes this movement particularly compelling is its synthesis of past and future. Many of these techniques echo ancestral practices long used by local communities—methods once dismissed in the age of бетон, now revalidated through modern science and engineering. As one expert describes it, this is “a new millennium rooted in the old.”

Challenges remain. Natural engineering is not suited for mega-infrastructure, and its success depends on interdisciplinary collaboration between engineers, biologists, and environmental scientists. In the Azores, additional hurdles included adapting established techniques to native species, avoiding the introduction of invasive plants. Yet through years of experimentation, the region has become a living laboratory—one whose lessons are now drawing international attention.

Today, from small forest trails to monumental yet nearly invisible retaining walls, the Azores are demonstrating that resilience need not come at the expense of nature. Instead, by working with the rhythms of the land rather than against them, these islands are quietly redefining what sustainable engineering can look like in the 21st century.

Adapted from a Pardela/SPEA study published in Atlântico Expresso-Natalino Viveiros, director.

Translated into English as a community outreach program by the Portuguese Beyond Borders Institute (PBBI) and the Modern and Classical Languages and Literatures Department (MCLL), in collaboration with Bruma Publication and ADMA (Azores-Diaspora Media Alliance) at California State University, Fresno. PBBI thanks Luso Financial for sponsoring NOVIDADES.