German artist Dietmar Voorwold (http://www.landart-creations.com/) creates geometric shapes and patterns out of the natural materials he finds on the site. 

Voorwold expresses his passion for his work:

I love art and I love nature. I love beauty. I claim to be a representative of beautiful art; something I expect of myself. It’s purely subjective, without any judgement. I want to feel good with art. It should arouse positive feelings in me and create moods I can cheerfully relate to. Artistically created images I would gladly choose to decorate my home, indulge my eyes and fondle my heart with. Art is an expression of harmony and the right resonance. Art is healing for the soul. Nature is my grandest stage and I`m very pleased when my Creations in Nature speak to you.