I've always loved the National Parks poster series. If I had the right style of house I would buy a bunch of the posters and frame them. Perhaps I will do it some day.
In fact, the posters were part of my motivation for taking Adobe Illustrator I. I've really enjoyed the class and the assignments. I had hoped to take the next level in the spring but the schedule for the class clashes with my own. Besides, I would do better to practice a lot more before I try to learn more. Very little of it is automatic.