Picturesque on the walls

Ok, did you want a wallpaper mural?

You can buy murals to fit the wall or just 1/2 the wall. Those in black and white are quite contemporary.

There are wall sized murals available that cover almost any kind of scenery.. start with Google search ... and see what you find from there... Pinterest.com has information on how to make a faux window.. using LED light strips and the mural could be made to look like a window... check it out.

I would recommend using a wallpaper mural. They come in lots of different designs including beach, forest, city skyline, sunset, etc....so you could choose the look you like for your space. They apply like regular wallpaper as long as your wall is smooth and flat. Check your local home center or online for options available.

Edgar are you an artist at all? Because you can do this on the wall with a template and a projector that you can simply make by placing template in front of a light and aiming it at wall then outlining it with a pencil and painting it in by yourself. Then as you grow tired of this look you can paint right over it instead of having to deal with a wallpaper removal which can damage wall regardless of how well you prepped the wall to hang mural up. If you stuck to a cityscape you could actually do a very modern take by keeping it very simple and using washi tape in black,but I still would cut out a template and shine on wall so that you get the look you want and it's level. It won't be 3D but it's modern simple and cheap.