Zagreb transforms into a cavalcade of light shows and audio-visual treats over four illuminating days. The festival kicks off with a 'Magical Forest' installation in Grič, the subterranean WWII tunnel beneath the Old Town that opened up to the public last Spring. The installation is hands-on, with participant's interactions influencing the display. Nearby, there's a cascading waterfall installation on Tomićeva, and Lotrščak Tower will be brought to life as a vivid lighthouse. The festival's showpiece is a high-octane 3D projection mapping show on Jesuit Square.