Glaciers are one of nature's most awe-inspiring features - constantly changing as environmental conditions shift.

In the case of the Fox Glacier on the west coast of New Zealand's South Island, the ice is retreating quickly, leaving behind unstable rock walls.

As a result, tourists aren't being allowed to climb onto the glacier.

Al Jazeera's Wayne Hay explains.

 

The Fox Glacier is a 13km long glacier located in Westland Tai Poutini National Park on the West Coast of New Zealand's South Island [Massey University]
Tourists are no longer allowed to climb on top of the glacier because of melting ice [Massey University]

Source: Al Jazeera