This recently discovered cave in Vietnam is massive beyond description. An entire forest is growing inside! There are no words to describe the enormity, and beauty of this natural wonder. The Empire State Building will fit inside!
"Cloud 009: This capture was taken during my flight from China back to Canada. It was so breathtaking that it felt like we were flying past heaven. I'm afraid this photo does not even do it justice." Photo by Mr. Zee, via Flickr.