The Murinsel, German for "Mur Island"

The Murinsel, German for "Mur Island"'

designed it to mark Graz's designation as the European Capital of Culture in 2003. An upside down turtle shell in the river Mur in Graz, Austria. Its steel-latticed glass and vaguely geodesic shape invoke artists' renderings of the deep marine cities.

At night, the island glows blue like a billboard for the Tron sequel. It is 155 feet in diameter, topped with a playground and an amphitheater. Under the waterline, there's a café and bar. It looks as if it's suspended between bridges to both of the Mur's shores, but it's actually on a floating platform.