Since the 1980's various artists, sculptors and painters mostly, have been communing with the land. Many use elements of nature such as stone, sticks, leaves, and flowers as their medium and regard the ephemeral nature of such art as part of its integrity. Others engage in architectural dialogs with the land, some with environmental issues in mind. Here are some resources for your creative dalliance...
"Earth Artists: Using Nature in Art to Raise Environmental Awareness". Eco Hearth: Come Home to the Earth
Art Nature Dialogues: Interviews with Environmental Artists by John K. Grande, 2004. State University of New York. (This book is in the Tomball Library collection.)
Wikipedia article on Land Art (This has the names of a number of other artists as well as a discussion of the philosophy behind the art)
Alfio Bonanno (Don't be deterred by the Finnish--just click on his projects!)
Gilles Bruni and Marc Babarit (Click on their 'catalogue' to see artworks)
Patrick Dougherty (Click on the link below his book to enter the site)
Tomball Library has a copy of his DVD Rivers and Tides: Working with Time. The camera follows this gentle Scottish sculptor as he discusses his creative process. His rock walls that wind through the landscape, leaf chains that float on meandering waters, and ice sculptures that glow in the sunlight are but a few of the natural media he has used.