I love to see communities reusing old stuff in a unique way.
Recently when visiting Greyrock Commons in Fort Collins Colorado, I had the pleasure of touring their common house. Not only do they have the absolute-most-coolest-ever-indoor-kids-play-area, but they had lovely wooden floors in their dining space. It turns out that I have a long ago connection to those floors as they were recovered during demolition from an old roller rink that I used to skate at when I was a kid!
Another nice reuse was the using of beetle kill pine wood that Wild Sage Cohousing in Boulder, Colorado used when building their bee hives.
What kinds of things has your community reused or upcycled?