2. Ghost City of the Pacific

Albert Lin travels to Micronesia, in the heart of the Pacific Ocean, to uncover the ancient island city of Nan Madol. Exploring the tombs, temples and ritual sites, all built on man-made islands now shrouded by centuries of jungle growth, Lin discovers not just a city but an entire ocean continent spanning thousands of miles.

3. El Dorado City of Gold

Albert Lin travels to Colombia to find out the truth about the legendary city of El Dorado. He explores the ruins of Ciudad Perdida in the Sierra Nevada mountains.

4. Stonehenge

Albert Lin uncovers a lost city that predates Stonehenge by 4,000 years; the "Manhattan" of its day, Blick Mead could hold the secret to why one of the world's most famous monuments was built.

5. Petra's Hidden Origins

Albert Lin travels to Petra, Jordan, to discover the origins of the famous city. He finds out that it was built by the Nabataeans, a mysterious civilization that learned how to survive in the desert. He tracks down evidence of their cities and temples, and reveals that the ancient city of Petra was part of a much bigger network than he ever imagined.

6. Inca Island in the Sky

Albert Lin travels to the mountains of Peru to discover the origins of its most famous site, Machu Picchu. Using LiDAR technology, he finds proof of the people who came before the Inca and treks into the mountains to find their homes and ceremonial sites. Lin reveals that the Inca city may have been inspired by another, even older civilization.