UNESCO says:
The Ligurian coast between Cinque Terre and Portovenere is a cultural landscape of great scenic and cultural value. The layout and disposition of the small towns and the shaping of the surrounding landscape, overcoming the disadvantages of a steep, uneven terrain, encapsulate the continuous history of human settlement in this region over the past millennium.
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UNESCO world heritage site

hive says:
hi, not sure if that photo is really from there, but the water sure looks the same color.