bottle trees. These are a fun tradition in the southern U.S. though anyone anywhere could build one. It's pretty easy to do (I think)- just make sure that it is firmly in the ground- you wouldn't want a big wind to come along and knock it over!
So, I posted a few bottle tree pics on facebook, and one of my friends (yes, I really do know her- we've even shared a hotel room!) came back with a picture of a wall made of bottles.
'Glass Bottle Walls'. I also found instructions on how to put one of these babies together. Wow! It's just astounding all of the ways folks have used bottles in construction, and they've been doing it for along time too.
As for me- I'm gonna get to work on drinking a lot of something- anything- as long as it's in a glass bottle!