I had a bit where I wanted to practice soem landscapes off the cuff for fun. These are a couple, but they are very basic and quick. They also showed how long it had been since I had messed with landscapes. When i sketch things like this I like to keep it really loose. The ice one is really chaotic and the bottom mountain one is ridiculously noisy and unorganized.
When you can see the problems, though, it means you can fix them!