Just below the surface, there's a whole different America hidden from public view. Take a revealing look at the America under our feet, from secret military installations, and experimental farms to tunnel networks and neutron lasers.
| Title | Modern Marvels - Season 17 Episode 7 Secret Underground |
|---|---|
| Year | 2022 |
| Genre | Documentary |
| Country | United States of America |
| Studio | History, H2 |
| Cast | |
| Crew | |
| Alternative Titles | Maravilhas Modernas, Merveilles modernes : alimentation, Meraviglie della modernità, Modern Marvels: Food |
| Keyword | technology, invention, disaster, construction, machine |
| First Air Date | Dec 10, 1993 |
| Last Air date | Aug 08, 2022 |
| Season | 23 Season |
| Episode | 705 Episode |
| Runtime | 44:14 minutes |
| Quality | HD |
| IMDb: | 7.90/ 10 by 27.00 users |
| Popularity | 62.262 |
| Language | English |
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