birch trees have always reminded me of vacations in Maine when i was little. they are my favorite tree. [I didn't see birch forests the one time I was in Maine, but they have them in northern Michigan and Wisconsin, too.
Check out the Beautiful "stained glass" water tower sculpture by Brooklyn artist Tom Fruin. It's in the DUMBO section of Brooklyn (the Down Under the Manhattan Bridge Overpass area.) It's made of plexiglass and steel.