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“Nipple Mountains.”
This is the informal name for Shanghai’s Twin Hills project. After seven years in the making, the hill was finally completed in September 2024, turning the flat coastal, barren land — a remnant of a steel factory’s pollution — into a hiking destination. The two mountains, apart from being artificial landscapes, were also hollowed out, housing a carpark within their cavernous interior and acting as a true project of terraforming.
Terraforming in architecture refers to designs that move and re-configure the basic ground layer that makes up a region. It is most widely known as land-sculpting and is an increasingly alluring practice, since it creates environments that blend harmoniously with nature while maximizing space and avoiding urban sprawl. In fact, apart from its spatial benefits, landscape structures also offer thermal insulation and reduce the urban heat island effect. The following projects exemplify an architecture of terraforming, where the ground becomes an integral part of the design, blurring the line between where the building begins and the landscape ends.
Landscape restoration of the Vall d’en Joan landfill site
By Batlle i Roig Arquitectes, Garraf, Spain
The new morphology drew inspiration from the layout of the cultivated terraces found in Italian gardens and hillsides, creating plots in different levels that eventually turned the whole site into an unconventional Metropolitan Park. Part of the site was also converted into an agricultural landscape through the use of specific hydraulic systems and vegetation. The driving force behind this transformation was mainly to raise public awareness and showcase new practices that society should adopt towards the environment.
Digging the Light (Qanat Villa)
By Kalbod Design Studio, Yazd, Iran
ET Flight 302 Crash Site Memorial Monument & Park Design
By Alebel Desta Consulting Architects and Engineers, Gimbichu, Ethiopia
Apfelhotel Torgglerhof: In full bloom
By NOA, Saltusio, Italy
The House Under the Ground
By WillemsenU, NB, Netherlands
The house operates optimally, since by burying most of it underground, the residents can benefit from the natural insulation and summer cooling of the hills, while a skylight placed on the curved roof, allows ample natural light to enter the space. Finally, the roof becomes part of the area’s rich vegetation, contributing to its high biodiversity as well as providing a good water buffer for the residence.
Agg Hab
By i/thee and Roundhouse Platform, Clarendon, Texas
Each of these projects offers a unique approach to merging human needs with ecological stewardship, reminding us that architecture can do more than shape the skyline; it can shape the ground beneath our feet, creating spaces that honour the land’s history, restore its vitality and redefine how humans can (literally) inhabit the earth.
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Featured Image: Landscape restoration of the Vall d’en Joan landfill site By Batlle i Roig Arquitectes, Garraf, Spain