Glaciers near the Matterhorn have melted so much it's forced these two countries to actually redraw their borders

Hut to hut hiking: the Matterhorn.

The line on the map that separates Switzerland and Italy has been re-drawn after the melting of glaciers caused major changes to natural borders. Much of the Swiss-Italian border is decided by glacial lines, which have shifted dramatically due to climate change. 

“Significant areas of the border are defined by the watershed or the ridgelines of glaciers, firn or perpetual snow,” said Swiss officials in a statement cited by Bloomberg. “These formations are changing due to the melting of ice.”