Wow. Thanks Map.
I heard about this a few months ago, but never saw any pics, and then I kinda forgot about it.
I saw a cave similar to that on the planet earth doc. on discovery, but the crystals in that cave paled in comparison to these. The crystals were there were different though, kind of course looking. I've seen a few similar smooth long crystals in caves here in the midwest, but maybe two feet at best.
Looks like a spelunker's paradise.

....or maybe it is the "fortress of solitude".