The first (Fleswick Bay, England) is hard to grasp due to an object that appears to be a pebble, which creates a sort of illusion; the second (Blafellsa, Iceland) I'm not sure if overhead of a big area, or a macro shot.
They show me, and hopefully you, how
the use of selective composition of showing only part of a scene instead of the more recognizable broader scene in order to draw attention to patterns
can ( and should ) lead us to interesting and thought provoking contemplation of what we are seeing. I.E. what are they showing us ?