This week's photo was taken in Far North Queensland in Australia. Large parts of northern Queensland are covered by rainforests, and as the name suggests these areas attract a lot of rain. As a result, waterfalls and rivers tend to be filled with water.
The strong sun, combined with the chlorophyll in the water, adds a green colouring to the water. This green contrasts nicely to the brown-redish rocks that are characteristic to the north Queensland landscape.
The use of an ND filter, ensured in a long exposure, which consequently yielded a milky touch to green water, while still retaining a clear suggestion of the flow of the water.