Natural Wonders

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Across
  1. 3. Falls on the border of Argentina and Brazil
  2. 6. Continent covered by ice
  3. 8. Kea, a massive shield volcano in Hawaii
  4. 9. Rocks in Sedona, Arizona
  5. 10. A steep-sided valley formed by erosion
  6. 11. Caves in New Zealand with bioluminescent insects
  7. 13. Flats in Bolivia’s Salar de Uyuni
  8. 14. Atacama Desert, one of the driest places on Earth
  9. 16. Cliffs along the Caribbean Sea in Mexico
  10. 18. Outback, a vast arid region in Australia
Down
  1. 1. National Park known for geysers and hot springs
  2. 2. Falls on the border of the US and Canada
  3. 4. Canyon carved by the Colorado River
  4. 5. Falls in Africa on the Zambezi River
  5. 7. Aurora Borealis, Northern Lights phenomenon
  6. 8. Everest, the highest peak on Earth
  7. 11. Barrier Reef in Australia
  8. 12. Caves in Kentucky, extensive underground formations
  9. 15. Capitan, a notable granite monolith in Yosemite
  10. 17. Sea, salt lake bordered by Jordan and Israel