400 million people attended the world's largest gathering, India's Mahakumbh Mela, and Nat Geo photographer and Explorer George Steinmetz was there to capture this footage featured in our Pictures of the Year 2025. Every 12 years, an enormous tent metropolis is temporarily erected for pilgrims celebrating the Hindu festival of Kumbh Mela and seeking absolution at the Ganges and Yamuna rivers. This year's festival was particularly significant, occurring during an astrological conjunction that onl

Vietnam, once devastated by war, has risen from the ashes to become one of the most dynamic places on Earth, all within a single lifetime. From ancient traditions to modern innovation, this is a country that has embraced change while preserving its roots, and Hannah is here to reveal how it made this extraordinary leap. Watch The Infinite Explorer with Hannah Fry, on Mondays at 8pm, on National Geographic UK | National Geographic UK