Natural Wonders of the World

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Across
  1. 5. What is the largest hot desert in the world, covering much of North Africa?
  2. 7. What are the famous waterfalls on the border of the United States and Canada?
  3. 9. What is the annual migration of wildebeest and zebras in East Africa?
  4. 14. What is the largest tropical rainforest in the world?
  5. 16. What is the world's largest coral reef system located off the coast of Australia?
  6. 17. What natural light display is typically seen in the polar regions?
Down
  1. 1. What archipelago in the Pacific Ocean is famous for its unique wildlife and Charles Darwin's studies?
  2. 2. What is the massive fortification in northern China built to protect against invaders?
  3. 3. What is the saltwater lake located between Jordan and Israel, known for its high salinity?
  4. 4. What is the highest mountain in Africa, located in Tanzania?
  5. 6. What is the first national park in the world, known for its geothermal features?
  6. 8. What scenic coastal drive stretches along the south-eastern coast of Australia?
  7. 10. What are the world's highest uninterrupted waterfalls, located in Venezuela?
  8. 11. What are the prominent mountains in Wyoming, USA, part of the Rocky Mountains?
  9. 12. What is the highest mountain on Earth, located in the Himalayas?
  10. 13. What are the waterfalls on the Zambezi River, forming the border between Zambia and Zimbabwe?
  11. 15. What is the vast, steep-sided gorge carved by the Colorado River in Arizona, USA?