Free Museum Weekend Now in its third year, the Free Museum Weekend invites visitors of all ages to explore the Australian Museum, and two Museum of Applied Arts and Sciences (MAAS) venues, the Powerhouse Museum and Sydney Observatory, free of charge. We are excited to annouce the Museums Discovery Centre, Castle Hill, will be joining the FREE MUSEUMS WEEKEND. 24 & 25 June 2017 Find out more online: MAAS maas.museum Australian Museum australianmuseum.net.au Museums Disocvery Centre museumsdiscoverycentre.com.au