Wall Decal / Graphic

I am looking for a fun wall decal for our living room. something we can remove when we move. The walls are a bright color between mustard and mango. I want something with a sprawling organic feel to soften some of our more modern furniture. There are tons of great decals on but so many have butterflies and things on them and I'm not looking for something that feminine. Whimsy is okay but nothing that would be suitable for a 12 year old's bedroom.