Investigating significant historic and contemporary sites from the revealing vantage points of drone, satellite, and aerial photography.
Discover strange aquatic mammals populating a river in Columbia, a ship marooned in sand along Namibia's Skeleton Coast and a Boeing 727 in a pine forest. (S2, ep 1)
Malta loses a natural treasure, an enormous fiery vortex is seen in California and a mysterious radioactive hotspot is found near Chernobyl. (S2, ep 2)
Explore a long-forgotten network of Native American earthworks, a battlefield mystery in Belgium and a mysterious blood red lake on a Greek island. (S2, ep 3)
Discover an underwater find from a violent past, a mysterious concrete 'ghost island' and never-before-seen tracks along the seabed. (S2, ep 4)
Reveal the truth behind ancient legends. Tour an island covered in polar bears, see bizarre twin craters and examine an ocean formation similar to Atlantis. (S2, ep 5)
Walk among colossal wonders scattered across the Earth's surface, including an ancient reptile skeleton, a massive head carving and a giant South African footprint. (S2, ep 6)
Walk along ancient pathways on Easter Island and discover designs carved into Asia's Eastern Steppe as you explore the planet's most puzzling structures. (S2, ep 7)
Explore some of the most cavernous places on the planet, including a mysterious Siberian crater and Greenland's bizarre black holes. (S2, ep 8)
Uncover a perfect circle carved around an ancient peak, a scary phenomenon in the Pacific and strange shapes in a Middle Eastern desert. (S2, ep 9)
Decode the secrets of long-lost human settlements, uncovering a Norwegian mound, a prehistoric stone circle and a lost city in the cradle of civilisation. (S2, ep 10)