Mountainous and high-altitude regions are considered to be among the most fragile ecosystems on Earth. From melting glaciers to land erosion, these environments face mounting threats from climate change, making it imperative to reimagine how architecture and its supporting infrastructure are designed for such places.

The communities settled in mountain ecosystems are especially vulnerable to the impacts of climate change because of their proximity to early symptoms of changing environments and lack of access to adaptive resources and materials. Beyond all poetic aspirations of building and living in mountain environments, it is an urgent challenge to design solutions that properly resist hostile climatic conditions and promote sustainable and safe human settlements in mountainous regions.

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Álvaro Siza's latest project in Portugal is a 16-meter high watchtower built with a lightweight steel structure featuring photovoltaic panels on the roof. This project is very different from most of Siza's works, both in terms of scale and materials. The watchtower is located in Serra das Talhadas, in the municipality of Proença-a-Nova, and is part of a larger project comprising several structures dedicated to ecotourism in the area, including the still unbuilt Miradouro do Zebro.

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