Wikipedia carved in mountain, great reply on Reddit

I just wanted to quickly share this reply from thejehosephat on my suggestion to carve Wikipedia in a mountain.

calculating

http://www.reddit.com/r/Lightbulb/comments/1hnlsg/wikipedia_carved_in_mountain/

El_Capitan_2009

I also created a separate page for this project.

So what do you think would be the biggest hurdle for this project?