Bolivia’s Chacaltaya Glacier, which is known to skiing buffs as the world’s highest ski run at 17,388 feet, has completely melted away, more glaring and awful evidence of the effects of climate change on the world’s oldest and most pristine glaciers.

In 1999, the head of a team of scientists studying the glacier since 1991, believed that the glacier would continue to exist until 2015, but the rate of melting tripled in the last ten years, and the once popular tourist and skiing destination is now gone forever.

The Chacaltaya glacier, which is part of Bolivia’s Tuni Condoriri glacier system, has lost a third of its ice since 1983. Scientists believe that Tuni and Condoriri, the two biggest glaciers in the system, will not last more than three decades. Illimani, a huge mountain near La Paz, is home to several glaciers, which may melt completely within 30 years. Of course, we can assume, that given the accelerated rate in which these ancient glaciers are disappearing, that those numbers are probably way too generous.