I have an Inground Pool, that is the biggest Pain in the BUM.

It was here when I bought the house. Problems are:
Nobody uses it except the Wild Ducks & the Dog. (PS Its a 1 person, 1 Dog home) The wild ducks do nothing but Poo in it all the time & the cleaner it is, the more they come to it.
It is on a large acreage property in the Australian Rural Residential Bush area. When it summer, its like a Hot Bath, When its winter, well you know, its freezing. When the wind blows it just simply fills with leaves & dust. Additionally, I depend on Rain for Water which rain is a rare occasion (Tank Water) so again, Evaporation is also another problem.
I cannot keep up the maintenance for it & for something that is not used.
The cost of running the pool it a complete waste of money. I dont know what to do with it, "Fill it in with Sand" or just "Leave it Empty", but I'm concerned about structual damage. Does anybody know if leaving it empty will it cause "Structual Damage?" I notice Public Pools drain theirs during winter with no damage.
I have thought about turning it into a Gold Fish Bowl with Lilies etc, but then it is just something more to maintain & further more the wild birds would have a FEAST on the fish.
Im sure there must be other people out there with similar problems. If anybody could help me with any GOOD SOUND advise, it would be greatly appreicated.
Many Thanks & Kind Regards to you all.
Robert E