BLiNNeMaNS wrote:a canyon doesn't have trees or water. a canyon has rockformations and an occasional dried out tree
a valley has loads of water and trees
It looks like you did not pay too much attention to geography and geology classes
A canyon is originary a more or less narrow trench, created by water erosion, when the ground was elevated due to geological events. The water tried to stay at ground level and forced itself a way through the landscape.
A canyon is not necessarily dryed out completely. Again, look at the Grand Canyon, the Colorado river has created it and is still going through. Btw. there is a nice IMAX 3D movie about it.
Certainly it looks more like rocks, but there are trees definitely at the rims, and at water level, where the water and the wind piled up some earth and seeds could grow.
A valley is not necessarily less deeper than a canyon, since a valley is by definition the landscape part between two mountains, or between the ridges of a mountain.
Valleys can also be very soft, between hills in Scottland, but also very rough between the mountains of the Alps, Rockies or Himalaya.
In the high mountains the valleys also don't have trees (beyond level of vegetation), and also not every valley must have a river.
If you still don't beleive, please search for pictures of the Grand Canyon in USA, of the Black Forest in South Germany, of the Verdon Canyon in France.
You will get enough examples for both arid and green canyons and valleys
