According to this article over at Outside Online, a huge piece of rock, weighing "millions of tons", has fallen off the side of Eiger, a 13,000+ foot peak in Switzerland. The slab was pushed loose by retreating glaciers, and has been threatening to fall for several months.
Eiger is one of the most recognizable and challenging climbs in Europe, with a sheer wall leading to the top of the tower. It was also immortalized in the 1975 Clint Eastwood movie The Eiger Sanction.