Mendenhall Glacier is the most famous sight in Juneau, the capital of Alaska. It’s also shrinking – 1.75 miles since 1929 and will continue to do so thanks to global warming.
The glacier is now 13 miles long and the ice takes around 250 years to travel the full length.
One of the best ways to visit is on a helicopter tour from Juneau which lands on the spectacular blue icefield (fact fans: glaciers are usually blue because ice absorbs all colours of the visible light spectrum except blue, which it transmits). NT