Cover Characteristics: Book Covers featuring Mountains

The topic of mountains ended up being harder than I thought it would be, so I went with a rather lax interpretation while looking for covers. That means hills, cliffs, mesas---really any of sort of relatively large, earthy, dirt-filled clumps of land---were all fair game in my mind. I feel like most of the covers I found have legit mountains, but then, I live where it's so flat that even a...