Professor Hannah Fry sets off on a global adventure, not just to see the world but to decode it; Hannah seeks out local voices and quirks of history and geography that reveal what makes each place truly unique.

Few places have an identity so celebrated across the world; Hannah Fry journeys to Ireland to discover what it means to be Irish; tracing her Irish DNA, riding the waves of a surf boom, and exploring hidden depths in the Irish language.

Hannah Fry explores how Iceland's geology shapes its culture; she meets scientists studying lava flows and geothermal power, and travels ancient Viking trails.