In what follows, Benedict de Spinoza’s ontology of immanence and monism is deployed as a means to launch a rethinking in between landscape and architecture. Public urban landscape, I suggest, is not a static and neutral construction, but a complex system of dynamic relationships within a continuous process of becoming and a generative field of non-oppressive, non-hegemonic power. This study focuses on two temporary structures by different European practices in the Royal Park of Kensington Gardens, in London. This study uses these works to ground a philosophy of radical immanence within our understanding of a contemporary world of landscape architectural objects. As this paper will show, within any landscape there exists a topology of multiple encounters modified or affected by each other, thus making landscape and architecture emerge from inside out — that is, from the matter or the territory.