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| Ralf Brown | profile | all galleries >> United States >> Pennsylvania >> Penn's Cave >> Penn's Cave - Cave Tour | tree view | thumbnails | slideshow |
| Adjust your monitor to show all 16 shades Monitor einstellen, so dass alle 16 Graustufen sichtbar sind | |||||||||||||||||
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 Out the (man-made) rear exit |
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 Lake Nittany |
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 Back into the cave |
 Meet the headache rock |
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