[eng]It is analysed the evolution of dune front (foredune), tree vegetation and the main sedimentary lobes (blowouts) of the dune system of s'Olla (Menorca) over the period 1956-2012. Results obtained allow concluding how the destruction of the first strip of dunes is determinant at the time to analyse the whole geomorphological behaviour of the dune complex. The synergy between the disappearance of the foredune and the decrease of vegetated surface makes these systems much more actives increasing the erosive vulnerability of their beaches. Furthermore, s'Olla is a clear example to see the role that its geological structure has in its sedimentary evolution over the time. Studies like this contribute with empirical data that can help to improve the management tools sustainable for these environments.