Poverty Point is a UNESCO World Heritage Site consisting of a complex of monumental earthworks located in Louisiana, USA. Recently, a series of mound-like features were discovered in a GPR survey buried beneath the ground in the centre of the site. Time Team’s geophys wizz Jimmy Adcock travels across the Atlantic to join a team of archeologists investigating these mysterious subterranean features. Could the origin of these mounds provide the answer to why Poverty Point’s prehistoric inhabitants chose this location for their ancient city? The team has just three days to find out! The Poverty Point resistivity survey was partially supported by a grant from the ISAP Fund of the International Society for Archaeological Prospection.