Over a 2 km axis along the former course of the River Turia, 5 main sections share their cultural purpose and give people the chance to participate in a futuristic and unique architectural complex, in large open spaces: L'Hemisfèric, the Príncipe Felipe Science Museum, L'Umbracle, L'Oceanogràfic and the Palau de les Arts. The planetarium L’Hermisfèric was the first section opened to the public. It represents a huge human eye that comes alive and opens up to the world: the "Eye of Wisdom". With over 4.5 million spectators, this is the only auditorium in Spain with a concave screen, 24 m in diameter, showing three audiovisual performances: representations of astronomical phenomena in the Planetarium, IMAX giant-screen films and state-of-the-art Omniscam Laser displays at the Laserium. Over the years, L´Hemisfèric has held courses, scientific lectures and exhibitions on astronomy, as well as hosting meetings for organizations involved in giant-screen cinema and planetariums.