Beautiful World

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Across
  1. 3. a piece of land that is completely surrounded by water
  2. 6. an area of lower land between two mountains or hills
  3. 7. having a lot of healthy plants
  4. 10. smooth and level, without higher or lower areas
  5. 12. a deep valley with very steep sides of rock that usually has a river running through it
  6. 13. a slowly moving mass of ice formed by the accumulation and compaction of snow on mountains or near the poles
  7. 14. very dry, receiving very little rain
Down
  1. 1. a thick forest with many large plants and tall trees growing very close together, usually in an area that receives a lot of rain
  2. 2. a large underground chamber, typically of natural origin, in a hillside or cliff
  3. 4. very impressive
  4. 5. a steep rock face, esp. at the edge of the sea
  5. 8. a naturally raised area of land, not as high or craggy as a mountain
  6. 9. a way or track laid down for walking or made by continual treading
  7. 11. a large area of land that is covered with trees