The Natural Bridge - a naturally formed rock arch over Cave Creek. Formed when a waterfall undercut a cave below it and dug a pothole on top, until the two joined and the creek flowed through the cave, leaving an arch across the front - Queensland, Australia - by Robert Downie. [2048x1365] via /r/EarthPorn http://ift.tt/1UD6OfG
via Tumblr http://ift.tt/1XHynfa
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