In 2015, we illuminated the stalactite cave in Ledenika, Bulgaria, with a large multimedia installation. With a diverse selection of multimedia technology such as video, laser, sound technology, LED lighting and fog generators, we created impressive effects in the stalactite cave. A 6m long water screen was also integrated in the main hall. The European Union supported the project with funding and we, together with their local partner Factor from Sofia, were chosen as project partners for the entire implementation.