This picture was taken just minutes before I got wet from the rain!
Depending on how you look at it, there could be many Halves.
It is a picture of half sky + hills against half water and reservoir dam.
It is a picture of contrasting halves, on the right you have the fresh calm water in a reservoir reclaimed from the sea, the armour protection on the right by the side of the road access is still bright and clear. On the left, the sea was already dark and somewhat choppy.
So, this photo taken at Plover Cove Reservoir, Hong Kong contains many contrasting halves!