Across
- 2. Low-level expansive areas
- 8. Tops of ridges and hills
- 10. Areas near the equator
- 12. Edges of rocky terrains
- 16. Points where land meets water
- 18. Large ocean expanses
- 20. Arid barren areas
- 23. Land edges by seas
- 24. Areas shaped by glacial drift
- 26. Broad open terrain
- 28. Boundaries of arid zones
- 29. Mountain areas covered in snow
- 30. Expanses of wooded areas
Down
- 1. Natural snow-covered crossings
- 3. Areas marking ice extent
- 4. Expanses of coral reefs
- 5. Regions with volcanic activity
- 6. Open areas of grassy ecosystems
- 7. Naturally heated water sources
- 9. Thick permanent ice layers
- 11. Margins of tectonic plates
- 13. Margins of natural landforms
- 14. Trails along mountain ridges
- 15. Extremely dry regions
- 17. Areas near the poles
- 19. Edges of land meeting water
- 21. Areas with deposited sediments
- 22. Sloping coastal edges
- 25. Coastal areas affected by tides
- 27. Regions of heavy moisture