How much was it?

I have to keep this on someone else's property but I also need to make it look like either part of nature or hide it very well and hope no one ever finds it or sees me hiding it and trying to find it themselves. If some prick found the safe, he'd just take it and try to brake it open with a sledgehammer or something.

I could just put it in a ziploc container and attach sticks and leaves to disguise it.. that might hold up pretty well, but I'm just looking for an ingenuis idea that will be practically infallible.