Our world is littered with contested borders. While the divisions between countries might seem solid and timeless in atlases or on Google Maps, the process of drawing up borders is usually rather messy and malleable. Unrecognized states, micronations and curious border zones often exist in a kind of limbo, in the shadows of international relations. The history of these territories is complex, and geopolitics play a large role in the determination of their future. What are the mechanisms that are at play here, and how can we look at these global developments from a cross-border perspective?