My current research topic is Visualising Geographically-Embedded Origin-Destination Flows: in 2D and immersive environments. Geographically-embedded Origin-Destination flow data (or OD flow data for short) contains information about geographic locations, and flows from origin locations to destination locations. Massive quantities of such data is collected by governments, industries and research organisations. The vast amount of data alone does not have an instant positive value to society, but the potential knowledge extracted from these data can lead to improvements to conventional procedures in many fields. Visualisation techniques have been used to support the analysis of OD flow data. However, due to its large scale and embedded geographic context, visualising such data is a challenging problem. I am exploring the design space of OD flow visualisation in both 2D and immersive environments.