Devils Marbles or Karlu Karlu are huge rocks found in Australia which have been given mythological reasons by Australian tribes ,they believe in its sacred powers.The aboriginal tribes believe that Marbles are eggs of Mythical Rainbow Serpent .The story is still alive and passed from generation to generation. These rocks are several meters high and extremly large in size.They consist of granite and were formed about 1640 million years ago.
These granite blocks expand and shrink little in size every 24 hours due to high temperature change between day and night .This causes some rocks to crack ,sometimes even splitting them to half.
The Devils Marbles conservation reserve is the main tourist attraction in northern territory of Australia.
The reserve is accessible throughout the year.