observatory cave_up_stream_entrance, _municipio_de_arecibo, _puerto_rico, _brian_killingbeck_2, I_AMC5744
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The upper entrance to Observatory Cave is huge. The limestone bluff above the entrance must be 300 feet (100 meters) high.

title observatory cave up stream entrance, municipio de arecibo, puerto rico, brian killingbeck 2
date yyyymmdd hr:mn 2008:11:08 06:48:20
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