Schematic view of the main structures in Arp220, revealed by MUSE. The three-colour image shows the [N II] shock emission, reconstructed from multi-component best-fit results. Superimposed yellow lines highlight the biconical outflow. Star symbols identify the four main SCs identified in Sect. 10. Cyan curves locate the main dust filaments possibly affecting the outflow geometry. The same curves are reported in the inset, showing the blue stellar continuum emission as well as the dusty structures in the innermost nuclear regions of Arp220.