4The Blue Caves of Zakynthos, Ionian Islands

Located on the northern coast of Zakynthos, the Blue Caves are a hidden natural wonder waiting to be discovered by adventurous travelers. Carved into towering cliffs by the relentless force of the sea, these sea caves are famous for their vivid blue waters, created by the interplay of light and shadow. Visitors can take a boat tour through the caves, marveling at the ethereal beauty of the underwater world and swimming in the crystal-clear waters.