Imagens do Dia: Montanhas e Cavernas

https://www.flickr.com/photos/erikstreufert/72982493/
http://awelltraveledwoman.tumblr.com/page/11
https://www.flickr.com/photos/glymur/159523685/
http://trovolo.com/destination/hamilton-waikato
http://www.bt-images.net/stunning-caves/
http://www.photoguth.com/2011/03/glacier-caves/glacier-caves-8-of-19/
https://www.flickr.com/photos/curiousexpeditions/1457903529/in/set-72157602205509345/