I was challenged by Peter Harris (@peadar). And the challenge is to focus on repetitive geometry (see fuither details below). I wanted to make a picture of a natural geometry. THis one goes also for the new abstract challenge.
Challenge: "focus on repetitive geometry. this can be lines or shapes and should include reference to light and shadow. The feature may be man-made or naturally occurring but should have some artistic merit.. As a subsidiary challenge, there should be good attention to detail in terms of basic technique (horizon, if appropriate, focus, angle of view, composition, light and shade, high/lowlights, tones and saturation etc)."