It is true that the Massassi shots distant shots were in guatemala, Im pretty sure that the close up shots were with the falcon crew landing werent shot there....
I will however, give you the points...
For those that are really interested, check out this site which is all about the mayan city, Tikal. This 4th temple in Tikal was actually what is seen in the yavin IV shot. This site has excellent 360 degree quicktime pics of the different temples
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Q. Why was Queen Amidala forced to land on Tatooine ??