Season 2

Aerial cameras reveal strange aquatic mammals populating a river in Columbia, a ship marooned in a sea of sand along Namibia's notorious Skeleton Coast, a Boeing 727 jetliner hidden in a pine forest. Plus, a giant, unusual pattern is discovered in the Nevada desert.

Malta loses a natural treasure, an enormous fiery vortex is seen in California and a mysterious radioactive hotspot is found near Chernobyl.

Explore a long-forgotten network of Native American earthworks, a battlefield mystery in Belgium and a mysterious blood red lake on a Greek island.

Discover an underwater find from a violent past, a mysterious concrete 'ghost island' and never-before-seen tracks along the seabed.

Strange aquatic mammals populating a river in Colombia, a ship marooned in a sea of sand along Namibia's notorious Skeleton Coast, a Boeing 727 jetliner hidden in a pine forest, and a unusual pattern is discovered in the Nevada desert.

The view from above reveals; the skeletal remains of an enormous ancient reptile, a colossal head carved into the Badlands of Alberta, a giant footprint in the wilds of South Africa, and gigantic, mysterious Pentagram in Kazakhstan.

Cameras capture the world from fresh and exhilarating perspectives. The planet's most puzzling structures are revealed, including ancient pathways criss-crossing Easter Island, gigantic designs carved into Asia's Eastern Steppe, and a tall pyramid rising from Antarctica's icy landscape.

Visits to some of the most cavernous places on Earth, including Greenland's bizarre black holes, an ancient forbidden well in the Yemeni desert and a voluminous void in Antarctica.

Cameras capture the world from fresh and exhilarating perspectives. Drones explore strange geological occurrences, unique man-made structures, curious creatures and lost civilizations, revealing fascinating insights and never-before-seen footage.

Cameras capture evidence of ancient civilizations. Featuring a mysterious Norwegian mound, a pre-historic stone circle on the banks of the Tagus River and a lost city in the very cradle of civilization.