nature

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Across
  1. 4. a small body of still water formed naturally or by a man
  2. 6. a mountain or hill, typically conical, having a crater or vent through which lava
  3. 7. a large natural stream of water flowing in a channel to the sea, a lake, or another river
  4. 8. a way or track laid down for walking
  5. 9. a piece of land surrounded by water
  6. 10. a structure carrying a road, path, railway, etc. across a river, road
Down
  1. 1. a large steep hill
  2. 2. a large area of water surrounded by land
  3. 3. a large area covered with lots of trees
  4. 5. a very large expanse of sea