View of Horca del Inca, Copacabana, Bolivia by Glen David Short

15 images taken with a Ricoh GX200 on 11th Dec 2012. The horizontal stone is called "Horca del Inca" - the "Inca's Gallows", but it is actually something more interesting - a kind of giant solar sundial that indicates the date. The small hole in the rock wall on the right casts a beam of light on the horizontal stone only on the morning of the June solstice (see Ritual and Pilgrimage in the Ancient Andes, Bauer and Stanish (2001), pp 208-209). I read somewhere there once existed several other stones in the same vicinity for indicating other dates but they were all destroyed by the Spanish who saw such solar observances as heathen.