The Murinsel is a unique floating platform on the Mur River, designed by American artist Vito Acconci to celebrate Graz as the European Capital of Culture in 2003. This futuristic steel-and-glass structure serves as a pedestrian bridge connecting both river banks and features an amphitheater, a cafe, and a children's playground beneath the dome. With its twisted shell shape, the island embodies Graz's innovative spirit as a UNESCO City of Design. The island is open 24/7 and free to walk across, offering a unique perspective of the river and surrounding architecture.