In this 6 x 1 hour series we showcase many of the world's greatest culturally and historically significant landmarks - the most iconic buildings, bridges and structures on the planet. How were they built and why? Join us as we celebrate human endeavour through the ages, exploring Stonehenge, Machu Picchu, Angkor Wat, The Great Wall of China, Petra, the Eiffel Tower, the Sydney Harbour Bridge, the Statue of Liberty, and more.