Nature

4. A low area of land between hills or mountains, typically with a river or stream flowing through it.
5. A large body of water surrounded by land.
6. A piece of land surrounded by water.
8. A large natural flow of water, typically flowing towards the sea, a lake, or another river.
10. A large underground chamber, typically of natural origin, in a hillside or cliff.
11. A large area covered chiefly with trees and undergrowth.
13. The time in the morning when the sun appears or full daylight arrives; the period during which this takes place.
14. A large natural elevation of the earth's surface rising abruptly from the surrounding level; a large steep hill.

1. A deep gorge, typically one with a river flowing through it, as found in North America.
2. A pebbly or sandy shore, especially by the ocean between high- and low-water marks.
3. A slowly moving mass or river of ice formed by the accumulation and compaction of snow on mountains or near the poles.
7. A dry, barren area of land, especially one covered with sand, that is typically hot and arid.
9. A cascade of water falling from a height, formed when a river or stream flows over a precipice or steep incline.
12. A very large expanse of sea, in particular each of the main areas into which the sea is divided geographically.
14. A piece of grassland, especially one used for hay.