Naica Mountain Giant Crystal Cave

This crystals are known, and I've just seen their photos some times. What was new for me, I did not imagine those crystals are really giant. Selenite gypsum crystals that were created by the nature when the mountain was created. Together.

The photo is from National Geographic, "Giant Crystal Caves Come To Light" where there is more information and there are more photos too.

I don't know if it's possible to visit this cave. Surely if will be. The problem is that they are in Mexico that seems to have ethernal internal problems and as not enough of sufferings they have that swine flu too... Well, we will pray the good God donates them peace and wellbeing and so everybody can visit this country without fear.

PS
I read that it's dangerous to enter these cave because there are toxic air or water or something else... Maybe it's better for conservation of this miracle of the nature.