What's this in the middle of the Amazon? (maps.google.com)

I bet it's a broken pixel on a CMOS/CCD sensor or a reflective (like aluminum) roof of a building.

There are some more spots at -6.0429, -65.2631 and -6.0214, -65.3033 – so I’d go with c1u’s guess of a broken pixel, as you would expect the same colour from reflections – and conspirators are unlikely to change the colour of their SECRET HIDEOgrmpfsdjhdksa

It looks a little larger than a broken pixel.. but maybe it's just that.