12 Stunning Artificial Islands around the World

5. Harbor Island Where: USA Harbor Islands in Seattle is one of the largest artificial islands in the world. Built in 1909 the island is built over a base of 24 million cubic yards of earth dredged from the Duwamish River. Stretching over 395 Acres of land, the island mostly consists of industries, ports, train stations and some sports stadiums. 6. Floating Island Where: Austria Designed by New York Artist Vito Acconci, is the shell shaped Floating Island in the middle of the Mur river of Austria. It has a gorgeous cafe and an open air public amphitheater.