PATAGONIA , Argentina, March 10 (UPI) -- An "ice bridge" connecting two glaciers in a lake in Argentina collapsed into the water on Thursday.
Video posted to Facebook shows the massive ice structure, attached to Perito Moreno glacier in Patagonia, slowly crumbling as bystanders cheer in awe.
Télam Agencia Nacional de Noticias wrote that the rupture caused "a unique sight" after standing for four years.
The naturally formed structure in Los Glaciares National Park forms a dam in the lake and over time the increase in water pressure causes the ice to rupture.
"Most [ruptures]...have been at this time of year -- at the end of the Southern Hemisphere's summer -- but we've also had one in July [in winter]. It's quite variable," park official Matilde Oviedo said according to La Prensa.
Previous ruptures occurred most recently in 2012 and 2008.