I've found articles on this from news sources that are large enough to have representatives in Guatemala City and nothing to indicate that it is a fake. They've also had significant size sinkholes before.
http://www.guardian.co.uk/world/2010...hole-guatemala
and
http://edition.cnn.com/2010/WORLD/am...aths/?hpt=Sbin
The Photo used by much of the news media apparently came from the office of the Guatemalan President.
If this is really a fake, I think that the CIA should really find out who did it and *hire* them...
I've heard of Florida having Sinkholes almost this size across and the rain from Tropical Storm Agatha must be doing *really* ugly things to the water table balance.