The Blue Caves of Zakynthos, Greece - stock photo

The Blue Caves of Zakynthos, located along the island's northern coast near Cape Skinari, are one of Greece's most stunning natural wonders. Carved by centuries of wave erosion, these sea caves are famous for their striking blue waters, which reflect and refract sunlight to illuminate the caves with an otherworldly glow. Accessible only by boat, the caves offer a surreal experience as visitors glide through narrow arches and peer into shimmering turquoise depths. The largest of the caves even allows small boats to enter, providing a unique opportunity to witness nature's artistry up close.