Key points from article :
Himalayan desert of Ladakh has a conical shaped manmade ice tower known as an ice stupa.
It's created by local people to store water and it will start melting when needed.
Area receives little rain, melting glaciers provide them water for irrigation and livestock.
When rainfall is at its lowest from March to July ice stupa starts to melt.
So the tower, which can reach 50 metres in height, melts slowly, feeding surrounding streams.