South Africa 
The combination of gray and orange (almost red) - A subtle reflection brought by the rock's own shadow on the water - Two textures: in the water (round) and on the rock (linear) - Title in reference to the "Battle of Blood River" of 1838 between the Dutch and the Zulus.
 
Available sizes : 
20x30 (A4)
30x40 (A3)
30x45 (A3+)
40x60 (A2)
50x70
60x90
70x110
100x100