Also, @rebeccazg, there is no photoshop that I can see (maybe some minor color retouching). The images where the water on the waterfall looks very smooth and dreamlike is a simple photography technique that has nothing to do with photoshop. All you do is set a longer exposure and since the water is in constant motion while everything else is stationary it comes out very dreamlike.
The 17th Picture, labelled “Waterfall Mist” is the Ngardmau Waterfall in The Republic of Palau, a small island nation in the south pacific. Quite a hike to get there but it’s a really refreshing and beautiful end to the journey!