A very rare sighting of the Berlin Spree river being frozen A very rare sighting of the Berlin Spree river being frozen A very rare sighting of the Berlin Spree river being frozen A very rare sighting of the Berlin Spree river being frozen A very rare sighting of the Berlin Spree river being frozen A very rare sighting of the Berlin Spree river being frozen A very rare sighting of the Berlin Spree river being frozen A very rare sighting of the Berlin Spree river being frozen A very rare sighting of the Berlin Spree river being frozen A very rare sighting of the Berlin Spree river being frozen A very rare sighting of the Berlin Spree river being frozen A very rare sighting of the Berlin Spree river being frozen A very rare sighting of the Berlin Spree river being frozen