Who dumped that old ute? Or the couch and the mattress? Whoever the culprits are, they can visit the Museum of Old and New Art, where their discarded junk has inspired an artwork made from sand.
Mona's latest commission, by French artist and director Théo Mercier, is a sand sculpture so impressively big it suggests an entire landscape - one strewn with sculptures of actual debris that the artist found on his travels in Tasmania.
Visitors to Théo Mercier: MIRRORSCAPE which opens Saturday, will be able to spot a car muffler, a sink, a washing machine, and an old boot among the ruins, all rendered precisely using sand.
Local rock formations also make part of the scene, with objects merging into rocks that have been weathered and eroded by time.
To develop the work, the artist travelled around the state taking pictures, but they were not the usual tourist snaps.
"I was searching mostly for broken places, not the most beautiful parts of Tasmania, but the ones that have some kind of accidental landscape," he explained.
It's the first time Mercier has exhibited his artwork in Australia, and constructing the sand-scape was a mammoth job.
Mercier and his team of four sculptors, along with museum staff had to transport 80 tonnes of sand to Mona's former library.
It was dampened and compressed into large bricks strong enough for the sculptors to carve into life-size forms, each one rendered in meticulous detail.
But the artwork is much more than simply an insanely ambitious sandcastle.
Mercier leaves it to viewers to imagine what sort of violent scenario might create a landscape such as this - perhaps a tsunami or an earthquake.
And as the title suggests, the scene also functions as a reflection of ourselves and the waste we create.
"You can actually see your own mattress, your own car, your own catastrophe," Mercier told reporters.
The artwork is on display for a year, and as the sand dries out the delineation of these objects will become less distinct, its colours will change dramatically, and parts of it could even collapse.
Not even Mercier knows how long this might take, although he predicts the artwork's main structures will last due to the high levels of clay in the locally-sourced sand.
Mercier has created sand sculpture projects in the past, but MIRRORSCAPE is the first time one of these installations has been displayed behind glass.
This not only stops kids jumping on it, for Mercier it brings to mind a laboratory specimen or a fossil - a remnant of a civilisation to be studied.
"It's a bit lost in time. You don't know if it's something really archaic, or something really prophetic," he said.
It might seem unusual to use sand to make art, but Mercier notes that humans are using and shifting sand all the time to build cities.
At any rate, he's just borrowing the material temporarily, to make an artwork that forces us to contemplate all the waste we would rather not have to think about.
"You pay to make these objects disappear, now you are paying to see them," the artist said.
The project was curated by Sarah Wallace and Jarrod Rawlins, and commissioned by Olivier Varenne.
Théo Mercier: MIRRORSCAPE opens Saturday and runs until 16 February 2026.
