Fodor's Expert Review Moeraki Boulders
These giant spherical rocks are concretions that were formed by a gradual buildup of minerals around a central core. Some boulders have sprung open, revealing—no, not alien life forms, but—interesting calcite crystals. The boulders stud the beach north of the town of Moeraki and south as well at Katiki Beach off Highway 1. Be warned that the boulders at Moeraki Beach have become a bit of a tourist attraction, and there are often whole busloads of people wandering the beach. Watch for little Hector's dolphins jumping in the surf just offshore; they're as interesting as the boulders.