Añado el 16º: Las "Sailing Stones" del Death Valley. https://www.google.es/search?hl=ca&safe=off&q=walking+stones&bav=on.2,or.r_gc.r_pw.r_qf.&biw=1366&bih=667&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=Yv1ZUOajA8q2hQeUk4CYAg#um=1&hl=ca&safe=off&tbm=isch&sa=1&q=sailing+stones+death+valley&oq=sailing+stones+death+valley&gs_l=img.3..0i19.6976.7957.2.9151.7.7.0.0.0.3.179.1102.0j7.7.0...0.0...1c.1.JMtxJuWnGeE&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=ae493cfab4a267f5&biw=1366&bih=667
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Añado el 16º: Las "Sailing Stones" del Death Valley.
https://www.google.es/search?hl=ca&safe=off&q=walking+stones&bav=on.2,or.r_gc.r_pw.r_qf.&biw=1366&bih=667&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=Yv1ZUOajA8q2hQeUk4CYAg#um=1&hl=ca&safe=off&tbm=isch&sa=1&q=sailing+stones+death+valley&oq=sailing+stones+death+valley&gs_l=img.3..0i19.6976.7957.2.9151.7.7.0.0.0.3.179.1102.0j7.7.0...0.0...1c.1.JMtxJuWnGeE&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=ae493cfab4a267f5&biw=1366&bih=667