In <a href="http://img801.imageshack.us/img801/7348/imag0127w.jpg">this stage</a>, right about <a href="http://img521.imageshack.us/img521/3764/imag0128p.jpg">here</a>, there is a secret on the ground near the trees, which looks like several concentric squares when viewed in FPV.
![enter image description here][1]

I cannot for the life of me figure it out, can anyone shed some light on it please?


  [1]: https://i.sstatic.net/mQIxC.jpg