Browsing through my optical illusion collection, I found out I have dozens of cool billboard ads that I never published on Mighty Optical Illusions homepage. Most of them are deceiving, but few are just cool innovative thinking. Either way, I wanted to share them with you in this post. You can find dozen of them inside, and further hundreds can be found in billboards category. This collection is Part I, and I’ll be posting Part II soon! Comment which one you liked the best, and which one you didn’t like. Don’t miss some other transparent billboards in transparent category. Enjoy!