A mantel is the shelf above your fireplace, whereas a mantle is a cloak, or possibly a layer of the Earth. I also wouldn't recommend drilling a hole beneath the Earth's crust and throwing photos of your loved ones into a rock layer with a minimum temperature of 500 degrees Celsius, because they might take it the wrong way.
By Ewalde1, via Wikimedia Commons
And if you hate your family, why half-ass it? Shoot those photos straight to the core.
It's pretty good stuff when they screw it up the other way around, too:
Can't you just picture Mitt Romney throwing his glove down, ripping that solid block of Italian marble away from the still-burning fireplace and hoisting it above his head with a primal roar as he claims his rightful place as the party's nominee? Yeah, I can't, either.