The striking, dark volcanic stone facade of the Church of Agios Nikolaos provides a beautiful geological contrast to its pristine white drum and brilliant blue dome. Located along the winding paths of Oia, this landmark breaks away from the village's typical pure-whitewashed aesthetic, leaving its dark volcanic masonry exposed to celebrate the raw basalt of the island. The traditional triple barrel-vaulted arches feature intricate windows embedded with decorative blue glass.