The proposal for architectural intervention in spaces underneath both the historical and the modern railway viaducts broadens and deepens pre-existing communities and ecologies, and reuses the available structures. It connects districts in eastern and western sides of the railway tracks by creating porous environment of passages in the ground floor level. These are intertwined with spaces for services such as shops, restaurants or bars, as well as rentable areas for a variety of public functions, or fully public spaces.