I went to a place they call glass beach while I was in Pt Townsend, in fact I stayed an extra few days to hit the tides right so we could go.
This photo is taken from the end of the beach looking back to where we started from.
There were tons of spark plugs, some car parts, glass and ceramic bits. The bluff above it was a old dump at one time so there is an amazing amount of goodies on the beach. Here's a picture of one of the car parts and my goodies!