The weekend-long event, which is one of the main highlights of the Edinburgh Science Festival, sees professional and amateur competitions taking place on Dunbar beach.
Take a look at some of the weird and wonderful sculptures created from rocks and stones in our picture gallery.
9. How's that!
Enthusiasts take part in the championships, which is now in its fifth year. Photo: Jeff J Mitchell
10. Hat's off
Enthusiasts take part in the European Stone Stacking Championships. Photo: Jeff J Mitchell
12. Keeping it together
It's a real balancing act and requires great skill to build a tower like this. Photo: Jeff J Mitchell
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