Sonar?

How big is the container? How deep is it? How long has it been there? I hope it wasn't biodegradable.

Flood the yard, look for sink-holes, or at least softer/harder ground with a metal spike.

If it's not too deep and big enough, you could drive something thin down at regular intervals til u hit something solid.

Maybe next time bury some uranium down there with it :P
Curiosity Reviewed by Curiosity on . BURIED TREASURE hello i have buried some treasure, however this treasure is not metal. I have spent 12 hours digging and moved around 14 tones of earth. I know it hasnt been taken. But for some reason it remains elusive... how could i go about finding it apart from a sniffer dog? Rating: 5