The Ancient Aliens episode (Season 18, Episode 3) explores the theory that some of the world's most iconic religious sites were intentionally built atop much older, mysterious structures. Ancient Astronaut theorists suggest these locations may have been chosen because they served as original points of contact between early humans and extraterrestrial visitors. The Core Narrative
: Referred to as a "heavenly gateway," the episode examines the layers of construction here and whether they hide evidence of ancient technology. [S18E3] Beneath the Sacred Temples
The episode investigates why early civilizations felt compelled to rebuild in the exact same spots across millennia. The narrative focuses on several high-profile locations: The Ancient Aliens episode (Season 18, Episode 3)