I don't know if countries other than Australia have this phenomenon, we our countryside is dotted by many instances of The Big [x]. For example, there's:
The Big Merino (in Goulburn):

The Big Pineapple (in Nambour):

The Big Rocking Horse (in Gumeracha):

...not to mention The Big Apple, Earthworm, Yabby (crayfish), and many others.
I would like you to make your own big monument.
Judging in about three days. Have fun!