Brockengespenst, the Brocken ghost or Brocken Spectre is an optical illusion that may appear only in three places on earth: on the Brocken mountain, in Germany (hence the name), in Scotland and Haleakala (dormant volcano, that is) in Maui, Hawaii. The "illusion" can happen if a few elements are in place: you are there around sunset, there are clouds and/or fog and/or rain. The illusion is that your shadow will appear surrounded by a rainbow. (Hawaiian name for rainbow is 'anuenue')
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