Hold on to your Toblerone, Switzerland's Matterhorn is at dire risk from rising temperatures and thawing permafrost.
The iconic Swiss mountain near Zermatt which inspired the triangular chocolate may be eventually be unrecognisable Experts warn its frozen core is heating up, making the surface unstable and prone to landslides.
The sharp, 4480-metre peak is one of the world's most recognisable. This might be no small thanks to its depiction on Swiss chocolate bars, that decorate airport duty-free the world over.
The Matterhorn is a prized summit for mountaineers, for its sheer vertical faces and geometric beauty.
However, a retreat of the glacial fields and year-round permafrost that holds the peak together has put the mountain at threat.