Fokiali, Kastelorizo, Greece. The light of the sun is refracted through the water and finally reflected in the interior of the grotto thereby producing this weird dazzling blue colour. ( The photo is 5 years old )

Fokiali, Kastelorizo, Greece. The light of the sun is refracted through the water and finally reflected in the interior of the grotto thereby producing this weird dazzling blue colour. ( The photo is 5 years old )