Across
- 5. the deepest and oldest lake in the world
- 10. often a movie set for Mars
- 11. Wuling Mountain Range
- 15. formed during the last ice age
- 16. limestone karst islands
- 18. coldest continent
- 19. has an underwater restaurant
- 20. 550 miles off the coast of Ecuador
- 21. Hexagon shaped basalts
- 23. largest animal movement
- 25. set in the Canadian Rockies
Down
- 1. natural phenomenon
- 2. The Smoke that Thunders
- 3. remarkably visible from space
- 4. home to Old Faithful
- 6. Cape Royal
- 7. highest waterfall in the world
- 8. active volcanoe
- 9. almost as large as the United States
- 12. highest mountain in the world
- 13. home to a billion trees
- 14. cost line for many films
- 17. cotton castle
- 22. salt flats
- 24. Devil's Throat Canyon