I don't know if this will fit your criteria...but...
http://konachan.comThis is a danbooru-based imageboard that hosts anime, gaming, and Japanese wallpapers. Try searching for what you want; Landscape actually got something cool.
If you want to search for a term with more than one word, use an underscore.
Also, it's a little on the NSFW I believe. In fact, it probably has a lot of content that's NSFW.