Edinburgh festival to erupt with sound and light spectacular
Deep Time event will beam 3D images of volcanic eruptions on to Edinburgh castle to celebrate city's geological historyFestivalgoers in Edinburgh will witness the city's birth from volcanic eruptions and the crushing force ice in a late-night spectacular that will open this year's events.To mark the start of the international festival next Sunday night, a digital light show will be beamed on to the castle and the chi…