“Open House Melbourne is an independent organisation that fosters public appreciation for architecture and public engagement in conversations about the future of our cities.”
Over the weekend of 29 & 30 July there are a lot of buildings open to the public and tours which are conducted. Most of the ticketed events are sold out, but there are many open places which don’t require tickets.
If they do the substation visit up the top end of the city again, highly recommend. Though it does sell out fast.