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Rainbows at the Inca site of Machu Picchu, Peru imaged in Jan '08 by Colin Summerell. Image ©Colin Summerell, shown with permission.

The Incas regarded the rainbow as a gift from the sun god and their multi-coloured flag represents Tawantinsuyo their land.

Here the sun was higher than 42° and the inner primary and reversed colour secondary bows appear in the precipice and below the horizon. They are slightly wider and more pastel than usual indicating that they were formed by the smaller water drops of light drizzle rather than the larger ones of a heavy rain shower.