Lake Tyrrell is a salt lake in the far north west corner of Victoria, 3.5 hours from Melbourne, and 2.5 hours away from Mildura on the NSW border. To make a multi day excursion, this would be a great trip to build into the Silo Art Trail.
From Visit Victoria: The 120,000 year old lake is regarded as one of the best places in Australia for star navigation, with the dark and endless skies providing the perfect environment to view the dazzling spectacles of the southern hemispheres constellations. The unique salty formation on the lake bed has also become a mecca for international visitors looking to capture that once in a lifetime photo opportunity, over the shallow lake's refective surface.
Although I have only been to the lake once, from that one visit I know that it will be a place that I will return to time and time again. The photographic potential is just enormous as the seasons and conditions change. The lake is dry for most of the year, leaving a hard salty expanse as far as the eye can see. You may be lucky and find large pools of water that can be used to create the amazing mirrored shots that have become so popular. The best time to visit is late October through to November, when there is a higher chance of water, and the heat turns the algae in the lake pink. The area gets so dark at night that it makes a perfect scene for astro photography, although my visit was during a full moon, so I'll need to head back again. I was lucky to get some fantastic sunsets that gave beautiful colour to the lake.
When you get to the lake, there is an old viewing platform near the entrance, then a brand new toilet block and viewing platform just after that. You can park here and walk down the the first boardwalk to explore, or you can keep driving to get to the new boardwalk shown above. I guess it all depends on where the water is on the day. As the lake is so shallow, the wind can blow the water from one side to the other.