Melbourne has an amazing "hidden" art scene, most people know all about Hosier Lane, but did you know that there's some much nicer spaces just up the road. The laneway was named for legendary Aussie band ACDC and has an evolving graffiti wall. As a local it's always a nice surprise when I find it has changed. It's nice even when the weather is bad - there's a little cafe called the Bull Run which has windows onto the laneway.
ACDC Lane is a little less touristy so you'll be able to get clearer shots of the artwork (and better selfies), and if you venture further on, you'll find yourself on Duckworth Lane which is just as interesting. This is just a great starting point for exploring the laneways of Melbourne’s CBD.