This is not, as the picture might lead you to believe, a series of stone renditions of the letter 'H.' It is, in fact, Puma Punku, which is the most sacred and special of all the sites in the ancient city of Tiwanaku in Bolivia.
This was most likely part of an ancient temple, and dates around 1500 years. It's the stones which have been used in the construction that are such a marvel; they're perfectly cut and shaped. We could replicate them today, but only because we have powerful tools and machines.