an unlikely pyramid

In the outskirts of Ballandean, a small town about 3 hours south west of Brisbane, Australia, lies a paddock. The thing that differentiates this paddock from every other paddock in the area is its unlikely contents: a 30 x 30 metre square and 18 metre high pyramid built with 9000 tonnes of rock. There’s no sign (except ‘no trespassing’), no explanation, and nothing surrounds it. It’s unlikely and unexpected.