There are TONS of antique bottles over the cliff.  Back in the day before garbage pickup people would throw anything that wouldn't  burn or compost over the cliff.  I live on the cliff side of Shades Crest and I can't put a shovel in the ground without bringing up glass; most of it broken pieces of old bottles and mason jars, depression glass, etc.  I find quite a few intact bottles as well.  Frequently the rain will expose these treasures.
Still looking for that gold that was supposedly buried during the civil war.