[Red Badger]

It looks like the outline of a temple and courtyard. Perhaps to some pagan moon god..................hmmmm, who could that be?......................

[TXnMA]

Couldn't resist "playing with" the image -- and doing a little wild speculation.

So -- I rotated the image until it was orthogonal on the page, and then did a little spatial filtering to enhance linear features. The white dashed lines are what linear features I think I can see on the enhanced image.

Then -- just for grins -- I overlaid transparent, colored polygons where I speculate that there were four (4) stacked (but, not necessarily concentric) raised mounds or platforms -- including a staircase from the second to the third level...

...and, you really don't want to know my wild-@$$3d theory on the why it was built -- and the function it served... '-)