Across
1
Line dividing two countries
4
Large natural stream of water
5
Largest river in South America
6
Low-lying land surrounded by higher ground
8
Large body of water partly enclosed by land
10
Visual representation of an area
11
Landform where river meets the sea
Down
2
Low area between mountains
3
Seasonal heavy rainfall
7
Land surrounded by water on three sides
9
Goods sold to another country