Another place that one needs to visit in Egypt is the Great Pyramids at Giza. Based on an article from National Geographic tourism is the 2nd largest source of revenue. In 2010 they earned $13 million in just tourism. How can it not be? if the Great Pyramids at Giza are one of the seven ancient wonders in the World. The pyramids were supposably built 5,000 years ago.
This website offers many interesting information about each pyramid: http://www.nationalgeographic.com/pyramids/khufu.html
References: http://travel.nationalgeographic.com/travel/egypt/pyramids-at-giza/