WHat is the strangest/weirdest thing you've come across?

While on a walk over the weekend, my walking buddy and I got to talking about weird and strange things that people might come across in the bush. I haven't seen anything completely out of the ordinary - the odd rusted out car that's been taken over by the bush, a few weight plates from a weights machine, or the odd remains of a camp that someone has been living at for a while. I remember as a kid bush bashing at the end of my street to come across a cave that someone had enclosed with sticks they must have painstakingly cut to fit between the roof and the ground to make it more protected. There were books and a blanket there as well. Looked pretty cosy actually!
I'm interested to hear what other people have stumbled upon that's been a little out of the ordinary.
I'm interested to hear what other people have stumbled upon that's been a little out of the ordinary.