There was one window and we decided to host a concert there… Colours of Ostrava & hotspot stage at the coking tower last week ranked among the most monstrous and adrenaline-filled music stage we have prepared and built so far. 10 m high, a lot of depressions in the ground and in the tower, and the associated strict safety measures during construction and for the artists, zero possibility of weighing the equipment in a standard way.