Machu Picchu - Intihuatana Solar Clock

The Intihuatana stone is one of many ritual stones in South America. These stones are arranged to point directly at the sun during the winter solstice. The name of the stone is derived from the
Quechua language: inti means 'sun', and wata- is the verb root 'to tie, hitch (up)' ('huata-' is simply a Spanish spelling). The Quechua -na suffix derives nouns for tools or places. Hence inti watana is literally an instrument or place to 'tie up the sun', often expressed in English as "The Hitching Post of the Sun". The Inca believed the stone held the sun in its place along its annual path in the sky. At midday on October 27 and February 14, the sun stands almost above the pillar, casting no shadow at all. Researchers believe that it was built as an astronomic clock or calendar.