In a city as dense with canals as Amsterdam, critical infrastructure doesn’t stop at the water’s edge. While landlocked cities rely on their own system of telltales to understand what lies beneath the surface (whether pipe, cabling, or other subterranean infra), when it comes to indicating there’s something beneath the water’s surface to be aware of, Amsterdam has invented its own system of telltales in the form of coded tiles fixed on to the sides of its canals.

While the majority of people still live in “unaugmented reality” for most of the time, what will happen to these tiles (and to our ability to see and understand the rest of the currently invisible infrastructure that surrounds our everyday lives) when that changes?