The lightshow is displayed on two of the old walls inside the inner fortification at Fredriksdten Fortress (Festning) in Halden, a border town to Sweden.
From the net:
Play of light that appear on the fortress walls takes us on the situation, environment, history and change 350 years. It is composed of animation and film, with amazing sound effects. Play of light appear on the walls of the inner fortress, eastern curtain wall and the upper reservoir. This is part of 350 year celebration to the fortress.
Play of light show every evening. See a short excerpts right below:
For more from my 2015 tours - visit: