The caves were discovered in 1897.
The interior water displays an intense blue color due to the reflection of the limestone rocks and the depth of the sea floor.
The largest of the caves is known as the 'Blue Grotto'.
The water temperature inside the caves remains cooler than the open sea due to limited sunlight penetration in the deeper reaches.
The Blue Caves are a series of natural geological formations located along the northern coast of Zakynthos near Cape Skinari. The site is defined by a succession of limestone arches and sea grottoes that reflect the deep blue and turquoise hues of the Ionian Sea. Sunlight refracting through the water illuminates the white seabed, creating a distinct glowing effect within the cavern chambers. These caves are accessible primarily via sea vessel, as the narrow openings and deep water depths require boat navigation. The geological features were formed over millennia by the erosion of the porous limestone cliffs.
The interior of the largest cave arch, where the contrast between the white limestone and sapphire water is most pronounced.
Choose a small boat tour to ensure the vessel can enter the smaller, more intricate cave arches.
Bring polarized sunglasses to better see through the water surface to the seabed.
Wear water shoes if your boat tour includes a designated swimming stop inside or near the caves.
Avoid taking large glass-bottom ferry tours if you wish to enter the smaller, more remote cave openings.
Access is highly dependent on sea conditions; trips are frequently cancelled during high winds or rough seas.
Do not touch the limestone walls, as they are fragile and ecologically sensitive.
