Where Rio Urumea meets the Bay of Biscay two glass cubes house one of Spain's most enigmatic congress centre, theatre hall, exposition space and cinema. Every year in September it houses the 'Festival Internacional de Cine de Donosti', and it has grown to be the city's main décor for cultural public activities. A large underground parking offers a cool but expensive park for those flocking the next door sun-and-surf beach of Gross. The building is surrounded by large outdoor terraces with a bar, restaurant, shops and showers. At night the building changes into a immense cubic lighthouse, enhancing the city's vibrant night-life.