Cage fungus (Clathrus ruber)
Found in Karawatha Forest Discovery Centre's carpark garden on 4 May 2017. Like a stinkhorn, it begins life as an 'egg' with a white bumpy surface and expands into this strangely beautiful lattice structure. The remnants of the egg are known as the volva. Its stench attracts flies, which take spores with them to the next mulch heap. The cage collapses after 24 hours of erupting from its shell.
In some parts of Europe, the name of this fungus translates to Witch's Heart. In France, it's called Coeur de Sorciere, Sorceror's Heart.