I did the same thing... on 4 mountains... But I let the stone when I've done that... I just took the grass, and dirt, and made a huge floating island, that I called "High Lands"... That remembers me a lot of fun
I found worse than a cobble box! yes it is possible: The Jack'O Lantern + soul sand box!!! Here look at the screenshot, and paste it into your wall of shame !
Being sarcastic! As real, I said it because of a douchebag launching while masturbating outdoor, wearing a slim jean and a pink sweater.