Life on the line, literally.
Australia's Blue Mountains are a thing of beauty, but these daredevils know how to get us weak at the knees.
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Earlier this month the international highlining community converged in the Blue Mountains west of Sydney to hang out. They insist the extreme sport is safe and fun.
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The highline stretched between the Corroboree Walls in Mount Victoria, rising some 27 stories high.
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How's the view up there?
Cameron Spencer / Getty Images
