7 November 2016 Last updated at 09:30 GMT
The balls are formed naturally and happen when pieces of ice get rolled by wind and water.
They stretch on the Siberian coast for 11 miles, near to the Arctic Circle.

18 March 2014 Last updated at 09:22 GMT
Richard Blake-Smith and his partner Anna beat Vytautas Kirkliauskas of Lithuania, carrying his wife, Neringa Kirliauskiene.
Rich said: "We put in a whole week's work, running around the athletics track near where we live - and it's paid off"
"We were pushed hard, especially by the Lithuanians there."
Competitors must tackle a 380-metre course, hurdling over haystacks, scrabbling up a steep slope, and dodging water pistols.
You don't need to be married to take part.
The race saw all combinations of competitors - men carrying women, men carrying men and one woman carrying a woman.
Rich and Anna will now compete at the World Championships in Finland in July.
Giant snowballs have appeared on a beach in Siberia, amazing local people there.
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The UK Wife Carrying Championships have a winner!