Rotterdam: The Latest Architecture and News

In increasingly denser urban environments, there is a new-found interest in underused spaces as opportunities for further development. Representing up to 25% of cities' land area, rooftops are among the most exciting spatial resources. From sustainable infrastructure and urban farming to social spaces and cultural venues, the article looks into the potential of creating a multi-layered city through the activation of urban rooftops.

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Like natural systems, great architecture is the product of circular processes. For Jan Jongert, a founding partner and architect at Superuse Studios, sustainable design is rooted in a continuous cycle of creation and recreation, use and reuse. Viewing re-use as a circular design strategy, the studio is developing strategies for cities to connect different flows and integrate these systems into the existing urban environment.

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Focusing on diversity, this curated selection of the Best Unbuilt Architecture showcases a multitude of functions. Submitted by our readers, the projects vary in scale, program, design, and representation. Coming from all over the world, many of these interventions are in progress, while others are still in conceptual phases.

Introducing innovative and out of the box ideas, this roundup includes a floating farm in the Netherlands, natural swimming pools in South Korea, a resort in Hungary, and a cascading museum extension in Armenia. Even more common functions such as a hotel in Vietnam, an infinity loop library in China, a mixed-use building in Iran, headquarters for Yandex in Russia, and a campus in Germany, present inventive approaches and intriguing imageries.

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In all cities around the world, there are some forms of residual space, forgotten pieces of the urban fabric, remnants of overlapping layers of past development. This land whose conditions make it unsuitable for most types of conventional construction might be a fertile ground for architectural invention. Assigning a new value to vacant corner lots, dead-end alleys and strangely shaped plots opens up a new field of opportunities for inward urban development, expanding available living space and increasing amenities in densely populated cities. The following explores the potential for experiment and urban activation held by urban leftover space.