Stones. Absolutely ludicrous amounts of stones. I’ve been digging out the abandoned beds in my garden and riddling out the soil and it’s about 75% stones, half bricks, broken glass, broken pottery… So the tip’s getting used to me turning up with my one functioning arm and dozens of fairly small bags of stones and other crap and my car basically sat on the bump stops.
Satisfying when done. Absolutely endless when doing.