A strange alien shrine on a mountain peak, a bridge built in the Alaskan wilderness, and an American castle with a dangerous secret are mysterious deserted engineering projects. New discoveries reveal how they were built and why they were abandoned.
| Title | Secrets of the Alien Shrine |
|---|---|
| Genres | Documentary |
| Release Date | 2018-04-24 |
| Episode Runtime | 00 Hours 42 Minutes |
| Season Number | 2 |
| Episode Number | 6 |
| Production Companies | Travel Channel, Science Channel, Procter & Gamble Productions, Like A Shot Entertainment |
