Pumapunku is the largest structure at Tiahuanacu. The way stones are scattered suggests that an earthquake may have brought the building down. They said the stones were left where uncovered. The next 2 pictures were taken of the inside of the same stone block. The only difference is that the compass is moved to different corners. Note that the direction of North has changed. No one knows why as there is no iron in the andesite rock. Some suggest alien involvement. I'm holding out for something more scientific. The last 2 pics show more of the Tiahuanacan stonework.Read more