I don't think the mountains in the first picture look right. Mountains tend to form in chains, and since the viewpoint is significantly above the tree line the image should show more of a continuous ridge on the lower slopes of the mountains. They still should have peaks, but not look like completely isolated forms.
Here is a gallery with a lot of scenic photographs. Several are similar to your first scene. The images are mostly landscape photos, not intended as backgrounds for other figures, so the focus of the compositions are a bit different than what you are creating.
You can page through the gallery by clicking on the pink bar on the right edge. Pictures are sized by the number of votes they got.
Warning: Site is not at all safe for work, and some images and ads will have naked females. Nothing hardcore in the images, but no guarantees about the ads. Limiting the search to 'scenery' cuts out almost all of it, but the main site is 90% skin.
This url is just the photos tagged with 'scenery'. Currently about 5 pages worth:
http://www.pixorgy.com/search/sceneryHope this helps,
Tourist