http://www.csmonitor.com/World/Americas/2010/0601/Guatemala-City-sinkhole-so-big-so-round-it-doesn-t-seem-real

http://www.prensalibre.com/noticias/derrumba-edificio-hundimiento-zona_0_271173066.html

http://www.csmonitor.com/CSM-Photo-Galleries/In-Pictures/Guatemala-sinkhole/(photo)/7