Association of Swiss Mountain Cleaners (April Fool's Day - 2009)
The Swiss Tourism Board released a video that revealed the secret of why their mountains stayed so clean. It was due to the hard work of the Association of Swiss Mountain Cleaners, whose members daily scaled the Alps, scrubbing the rocks of unsightly bird droppings. The cleaning not only maintained the beauty of the Alps, but also prevented the droppings from eating away at the rocks, causing cavities that might eventually lead to the complete erosion and disappearance of the mountains.
Millions of people watched the video, and 30,000 took the online test to determine whether they had what it took to become a mountain cleaner (aka "Felsenputzer"). Later that year, due to popular demand, the Brunni cable car company began offering an actual mountain cleaning course that attracted would-be Felsenputzers from around the world.