What on Earth?Season 92021 · 10 episodesEpisodes1Curse of the Amazon NazisExperts follow evidence of a Nazi base in the Amazons to a dark discovery.2Epstein’s Forbidden TempleSatellite images capture a mysterious building on Jeffrey Epstein’s island.3Aztec Alien MysteryImages reveal an alien substance in the land of the Aztecs.4Gate to the Viking GodsNew evidence reveals a Viking portal to their spiritual realm.5America’s Swamp CastleImages reveal a forgotten war-torn fortress in the swamplands of Louisiana.6Lost City of the VampiresExperts uncover a gravesite with the remains of possible vampire burials.7Temple of the Island EaterA mystery in Hawaii points to human sacrifice and a shape-shifting god.8Horror of Dead Man's IslandSatellites lead experts to an island that may be linked to a massacre.9Stalin's Secret AtlantisWhen experts spot what appears to be an abandoned city in the Caspian Sea, they investigate declassified Cold War evidence to reveal an Atlantis-like city built by the Soviets; what they find exposes its long-lost secrets.10America's Secret ApocalypseSatellites capture evidence of catastrophic and secret military testing.Season 1Season 2Season 3Season 4Season 5Season 6Season 7Season 8Season 10Season 11Season 12
