2. Greece

Hannah Fry journeys across islands, mountains and olive groves to reveal why ancient Greece was the birthplace of so many big ideas. She decodes the Parthenon’s geometry, sails the Aegean with ancient tools, tries her hand at olive farming and is swept up in a riotous flour-throwing festival that blends ancient myth with modern identity.

3. Ireland

Ireland doesn’t take up much room on the map, but few places have an identity so celebrated across the world. Hannah Fry journeys to her ancestral homeland to discover what it means to be Irish. She traces her Irish DNA, rides the waves of a surf boom, explores connections to the land at the races and reveals hidden depths in the Irish language.

4. Iceland

Hannah Fry visits Iceland to uncover the secrets behind its success. She meets scientists predicting lava flows, sees how geothermal power fuels an algae farm, explores Icelandic DNA and rides horseback through ancient Viking landscapes - all to reveal how a tiny, isolated island, shaped by geological extremes, is thriving against the odds.

5. Vietnam

Hannah Fry explores Vietnam’s remarkable post-war transformation: From moped chaos in Ho Chi Minh City to the muddy graft of prawn harvest in the Mekong Delta and a restorative spa bath in the misty hilltops of Sapa, Hnnah reveals a nation embracing change, where striking contrasts are balanced by a spirit of cooperation and strong family bonds.

6. Spain