Unusual Landmarks

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Across
  1. 4. – Famous waterfalls on the border between Canada and the USA
  2. 6. – Highest mountain peak in the world
  3. 7. – Massive canyon carved by the Colorado River
  4. 9. – Largest salt flat in the world
  5. 10. – Largest coral reef system in the world
Down
  1. 1. – First national park in the world
  2. 2. – Formation of basalt columns in Northern Ireland
  3. 3. – Slot canyon known for its unique rock formations
  4. 5. – Glacially-fed lake with stunning turquoise water
  5. 8. – Hottest and driest place in North America