In Perus Pisco Valley, there is a strange alignment of thousands of shallow pits.

Their purpose or function is a mystery.

The feature is locally known as Monte Sierpe (serpent mountain) or Cerro Viruela (smallpox hill).

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It is also called by the name Band of Holes.

Since then, very few archeologists have visited the site.

He estimated that there are about 5,000 such graves in the area.

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The holes are about three feet across and 20 to 40 inches deep.

Satellite view of Band of Holes.

The Band of Holes is constructed along a road leading from the valley floor to Tambo Colorado.

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Stanish explains that Inca state was a far-flung empire, and its separate regions retained some autonomy.

Monte Sierpe may have satisfied a very local need.

Jean-Pierre Protzen, a specialist in Inca architecture at the University of California, disagrees.

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He thinks the holes may have been used to store guano, an important fertilizer.

The fact is, we still dont know who created the holes or why.

Photo: Paul Catacora

Photo: Nils Castro

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