[PurpleQ]

Maybe a burn barrel or maybe to catch rain water???

I am just trying to think up some rational explanation that isn't creepy :-)

[RosieCotton]

Hopefully it wasn't full of toxic chemicals that have leeched out into the ground leaving the barrel empty...

I guess if the pony sprouts another head, we'll know somethin's wrong...

[My back yard]

Maybe there are more. Once full but now empty.