The Eye of Earth is a karst spring located in Croatia’s Mount Dinara Nature Park. The lake has a unique blend of blue and emerald-green colors. Its elliptical shape makes it look like a dragon’s eye from above.
The small body of water is the primary source of the Cetina River, which flows from the northwestern slopes of Dinara — 6,000 feet above sea level — down through southern Croatia.
No one’s precisely determined the depth of the cave containing crystal-clear water, but they suspect it to be more than 300 feet deep. According to the legend, a meteor crash at the site created the dragon’s eye formation.
However, this hidden gem is no easy dive or swim, as the water is frigid. Temperatures can go as low as 46.4F, even during 95F summers — quite the opposite of a hot spring!