One picture of our son, in action, every day.
For an introduction to an amazing artist Google the images at "andy goldsworthy arches." He does amazing things all with natural elements, and has huge stone pieces at the National Gallery of Art in DC and a new one at the St. Louis Art Museum. A wonderful film from 2001 is "Rivers and Tides" which is on YouTube. Highly recommended for a look into an incredibly talented mind.