Survey: where do you get your rocks in Mass?

[Dave Allen]

Hey all,

Since getting into planted tanks, I find myself always looking for interesting rocks: at the beach, on the highway, etc. I'd love to find a good source of rocks for a few iwagumi projects, but there is no way I'd pay to have ADA-style rocks shipped.

So I'm wondering:
Where does everyone get their rocks in and around the Bay State?

And are you willing to share your source?