Today, the shortage of urban land and agglomeration economies make urban concentration essential. At the same time, the rise of sea level, flooding and soil erosion become elements that influence our urban environment. We thus propose a ‘sponge city’ as a strategy to address this problem. We design an urban system including different categories of urban spaces: towers, transition, low-rise building & base level and underground. Concerning the towers, we consider that the solid central core is not anymore adapted to people’s needs of communication. Instead, we plan to remove it and use the atrium as one of our main design strategies to emphasise the accessibility and visibility between spaces. The second strategy is to build bridges as connections both inside the individual tower and outside the towers, and further this connection with the surrounding environment. Additionally, we have considered their structural stability and sustainable development.