Athabasca Glacier, Jasper National Park, Canada

If you want to visit this glacier in the Canadian Rockies, you’ll have to be pretty quick. Due to climate change, the Athabasca Glacier is disappearing at an alarming rate. The current four mile (6 km) glacier is one of the most visited in Canada and also among the most accessible. Scientists say the glacier is receding at a rate of around 16 feet (five metres) each year and they found tunnels and shafts underneath caused by the melt water, which they said is incredibly beautiful, but alarming.