Every year in October the Signal festival is held in Czech republic , where it is illuminated by light projections on the buildings and music fills the streets. Signal has expanded to have more illuminations in transport zones 1-3. This is one of the best festival n Europe and is endlessly innovative. Everything is made exclusively for the event and the lightshow is worth a trip to Prague. If you are ever in Czech Republic be sure to stop by the signal festival and enjoy the show.