They are called the Moeraki Boulders, strange orbs of stone near the New Zealand village that bears their name. The Moeraki Boulders, almost identical to the Ball Beach of Mendocino in California, are unusually large and spherical boulders lying along a stretch of Koekohe Beach on the wave cut Otago coast of New Zealand between Moeraki and Hampden. There are many theories about where the circular boulders come from, but the prevailing one is that they are volcanic and many millions of years old.
