I'm not sure if this bike is a fully authentic 'left behind' object - but even if it has been artfully placed, it's been there for a while.
This bike was parked (abandoned?) outside one of the original houses in the Corinna township we stayed in during our trip to Tasmania.
The amount of rust on the bike is a testament to the amount of rain the area receives.
You can find more macro shots at Macro Monday2 and I Heart Macro. SM