Burnt rice was discovered when the land owner built this house. Actually it's a private land but they are opening their place for visiting and to see burnt rice and the place where it was discovered. Why this place important is, it's an evidence of an ancient battle was happened here. So it makes us feeling that we are standing and living on continuous history from the ancient people. Read explanation in there. Actually you can find it from the other user's photo. Fyi, to get here, you need to enter through the batik market. Ask someone if you can't find. If you're reached at a community mosque, you need to come back and ask someone.