Superstellar clusters and supergalactic winds

We review the properties of young superstellar clusters and the impact that their evolution has in their host galaxies. In particular we look at the development of strong isotropic winds emanating from massive clusters, capable of disrupting the remains of the parental cloud as well as causing the large-scale restructuring of the surrounding ISM. As an extreme example, we infer from the observations of M82 the detailed inner structure of supergalactic winds and define through numerical simulations the ingredients required to match such structures.