Now there’s two words you don’t often see together. In fact, Google Trends lists zero occurrences of the phrase between 2004 and now. Even “German humor” produces a graph (albeit a rather flat one). But not only is there some evidence that Swiss comedy does exist, it might just be that being well-hidden is kind of its thing. Find it and laugh. Or don’t, and the joke’s on you!

That evidence, as it turns out, is cartographic. The Swiss Federal Office of National Topography, Swisstopo for short, is a decidedly serious institution. Many serious things—time and money, for starters—depend on the accuracy of its maps. In the case of its mountain maps, actual lives hang in the balance. Yet in decades past, the austere institute’s maps have served as the canvas for a series of in-jokes among its more fun-loving cartographers.