This is a 3D scan of an Aztec sculpture, it's a demo model from Go!SCAN 3D.
There is a color model and 2 STL models that I have edited a bit (fixed holes, smoothed some areas) and gave a flat base. One file is a big original scan, the other is a smaller reduced version. I used MeshMixer for editing, download it for free at http://www.meshmixer.com.