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Rays of Light by Craig Ferguson on 500px (Sun shining into the entrance to the Khao Luang Cave temple, Phetchaburi, Thailand)

Mail Onlinefrom Mail Online

Into the blue: Stunning images from within Iceland's tallest volcano

The deep blue Crystal Cave of Svmnafellsjvkull (CORR) in Iceland was created by the glacier from Vrffajvkull Volcano's icecap meeting the coastline. The deep blue color is due to centuries of compression removing air from the ice. via dailymail.co.uk Photo by Orvar Thorgeirsson #Vatnajvkull #Iceland #Crystal _Cave_of_Svmnafellsjvkull #Orvar_Thorgeirsson

Mail Onlinefrom Mail Online

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!