Thailand: Climbing might not be the first thing you'd imagine when you think of the endless beaches and laid-back atmosphere, but some areas are an international destination for climbing and caving. - From The Active Times (Image via naturesdoorways on Tumblr)
Into the depths of the earth: Cave network in the heart of Vietnamese jungle is so large its end is yet to be found
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!