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Don't miss Iguazú Falls: one of the most popular sights of Argentina.
14.7 million
Pyramids of Giza - Egypt
You can't tell without seeing the pyramids.
to show the tourists which way to the mummy tombs
8.6 million came to see the Egyptian pyramids in 2005. hope that's a close enough answer.
an average of 14,000 to 30,000 people
Why do you think people were so interested in seeing Hooke's drawing?
It has great importance in modern times because it is a great economy for the tourists.
besides
Use them? Well, tourists visit them, so I suppose the people who sell camel rides around the pyramids etc. are "using" them to make a living.
Tourists usually enjoy seeing tropical trees such as coconut palms because most do not have these trees in the areas where they live.