 |
| Add caption |
Amateur photographer Risto Mattila was among those who came across the "ice eggs" on Hailuoto Island in the Gulf of Bothnia between Finland and Sweden.
Experts say it is caused by a rare process in which small pieces of ice are rolled over by wind and water.
Mr Mattila... told the BBC.
"There we found this amazing phenomenon. There was snow and ice eggs along the beach near the water line."....
In 2016 residents of Nyda in Siberia found giant balls of ice and snow covering an 18km (11-mile) stretch of coastline.
They ranged from the size of a tennis ball to almost 1m (3ft) across.
