While surfing, I ran across this totally awesome park/installation by West 8. An excerpt from their project description:
One of the inner gardens of the Carthusian Monastery of Padula, Italy, has been strewn with thousands of pinecones collected by children in the neighbourhood. In combination with the existing cedar trees, they create an aroma of forest and dried wood. The excess of pinecones is overwhelming and the crackling of drying seeds in the sun brings a consciousness of the evolution process. During the night the pinecones glow from underneath with a red light.