This chapter presents the results of recent extensive high-resolution magnetic surveys of the landscape associated with the princely site of Vix and Mont Lassois with its remarkable architectural remains and submontane necropolis. Current investigations focus on the area around this ancient trading hub from the Late Bronze Age through the Hallstatt Culture and into the La Tène period. So far, archaeological investigations have shaped detailed ideas about the development of society and its ritual and mortuary practices, but most of the landscape between the monuments has not been explored thoroughly. Nowadays, a set of state-of-the-art methods and tools is available with which to identify hidden structures in a cost-effective and, at the same time, non-destructive way. While early aerial photography paved the way, enhanced by satellite imagery and LiDAR, geophysical surveys provide insights into internal structures of monuments and – on a landscape level – into large and complex systems originally shaped to express power and ritual beliefs.