Sea Organ of Zadar

Long story short: "This incredible piece of architecture is built along the coast line of the 3,000-year-old city of Zadar, Croatia. The Sea Organ of Zadar attracts thousands of tourists and locals each year with its soothing and 'meditative' lullaby. The organ was created as an architectural object to remedy the never-ending concrete wall which was the product of post-WWII reconstruction."

[via Milena]