Jeju

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Across
  1. 3. the name of Jeju's volcano
  2. 6. a tall building near the sea that sends out a warning
  3. 7. a big machine with engines and wings that can fly
  4. 8. a sandy place next to the ocean
Down
  1. 1. lots of trees
  2. 2. an opening in a mountain where ash and gases come out
  3. 4. a sweet red fruit with green skin
  4. 5. a boat that is propelled by water