Located  on  the  west  bank  of  the River  Nile  on  the  outskirts  of  Cairo,  the  pyramids  at  Giza  in  Egypt  are  the  only  example  of  the  original  Seven  Wonders  of  the  World  still standing.  The  Egyptians  constructed the  pyramids  between  2700 BC  and 1000  BC  to  serve  as  tombs  for  their  rulers  or  pharoahs. 

A pyramid is a structure with four triangular sides that rise to a point.  A pyramid may have a base that is square or a rectangle.  About 80 pyramids still stand in Egypt.  The largest pyramid ever built is called the Pyramid of Khufu at Giza.