Colour

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Across
  1. 4. (Bolivia) Known for its red-colored waters.
  2. 6. (USA) Dramatic red sandstone formations.
  3. 9. (Istanbul) Interior tiles create a blue hue.
  4. 11. (Oz) Legendary city said to be green.
  5. 12. (Chile) Glacial lake with gray ice.
  6. 13. (Italy) Sea cave with intense blue water.
  7. 14. (Moscow) Famous for its red brick buildings.
  8. 15. (China) Clay warriors with terracotta (reddish-brown) tones.
  9. 16. (Australia) Naturally pink-colored salt lake.
  10. 17. (Portugal) Coastline known for its silvery light.
  11. 18. (Africa) Known for its yellow/orange sand.
Down
  1. 1. (USA) Known for its iconic white facade.
  2. 2. (USA) Known for its "international orange" (golden) color.
  3. 3. (Germany) Dark evergreen trees give it a blackish appearance.
  4. 5. Vast ice sheet gives it a white/green appearance.
  5. 7. (Africa) Named for the historical ivory trade.
  6. 8. (USA) Named for its yellow-hued rocks.
  7. 10. (Philippines) Hills that turn brown in dry season.