Where were these pictures taken?
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M$2 Answers
http://image42.webshots.com/42/7/57/89/2658757890056786576xplMpn_ph.jpg
I've also figured out that the man in the top statue is Simon Bolivar. Here is a very similar statue, possibly from the same mold:
http://www.bridgeandtunnelclub.com/bigmap/outoftown/california/sanfrancisco/civiccenter/civiccenter/08bolivar.jpg
Wait, I'm changing my mind on the first one. It is definately the statue in front of the Congress building in Lima Peru This looks like the exact statue only with a fence:
http://pro.corbis.com/images/IH074572.jpg?size=67&uid={DF27320A-5DB8-49E9-BFD5-04D99C20793C}
http://upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Peru_Lima_Congreso_Detail_centre.jpg/250px-Peru_Lima_Congreso_Detail_centre.jpg
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M$http://wikis.lib.ncsu.edu/images/1/16/Simon_Bolivar.jpg
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M$





If that is the case, then Nixon visited (as far as I can deduce)
Asuncion, Paraguay
Bogotá, Columbia
Buenos Aires, Argentina
Caracas, Venezuela
La Paz, Bolivia
Lima, Peru
Montevideo, Uruguay
Quito, Ecuador
The second picture looks like a statue of an explorer, but I can't figure out which one.
Wow, you've got a good set of eyes!
I can't see any of the links you have given, but #1 is a positive ID of Lima, Peru, Good work.
Still hoping for #2
I see the flag in #3, and it does appear to be the Colombian flag in the full size image.
It is quite possible (probable) that these pictures are from several different Latin American locations. From the best I can tell, they were taken during Nixon's "Goodwill tour"