Slattern

Is it a roofer's store?
Is it a small quarry deposit?

Nope. It's the inside of my car boot, and my successful acquiring of a ton of slates to put down in the garden to conquer weeds without chemicals.

Slates sourced via Freecycle (or 'Freegle' as they now name changed it for some opaque reason). Hurrah for generous, waste-hating folk in our community and t'interweb which helps us find each other!