Awesome 3-D Tour of a Chinese Supercave

National Geographic reports on a first -- 3-D laser mapping in China in three of the world's largest caves. 

Inside such a massive space...it's like a starless night, the explorers explain. 

But their cutting edge laser technology enabled them to see and map the caves with wonderful, new detail never before possible. 

For a terrific video with the awesome results of their project: http://kenallensforum.blogspot.com/