Ancient Aliens: Origins (2024)

S1E5 Mysterious Underground Worlds

Hidden beneath China are the Longyou Grottoes, a stunning underground wonder featuring majestic staircases, vast corridors, and towering ten-story columns hewn from rock estimated to be over 15,000 years old. This extraordinary find draws parallels to Derinkuyu, a mysterious subterranean city in Turkey. In the American Southwest, there are whispers of secret tunnels linked to Native American myths about the Ant and Snake People, rumored to conceal covert government UFO activities. Similarly, in Egypt and Ecuador, it's long been theorized that libraries from a vanished civilization may be hidden in underground caves. Could these sites and others confirm ancient tales of subterranean worlds inhabited by extraterrestrial life? What otherworldly mysteries might be lurking beneath us?