NATIONAL PARKS

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Across
  1. 3. US National Park's citrine?
  2. 4. US National Park in California
Down
  1. 1. Island in NW Lake Superior, Michigan, forming part of a US National Park
  2. 2. Big ____ is the only US National Park from which you can cross the border into Mexico
  3. 5. Grand -----, US national park in Wyoming