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1x1 Fortresses
Season 1 Episodes
8 episodes
44 min
1. Fortresses
Explore a massive defensive wall surrounding a historic Colombian city and see how a series of eerie metal structures protected the English coast during WW II; then visit a vast underground refuge in Turkey designed to protect tens of thousands.
43 min
2. For the Gods
Explore some of the world's remarkable engineering marvels.
45 min
3. Episode 3
No description available.
44 min
4. Episode 4
No description available.
43 min
5. Episode 5
No description available.
44 min
6. Episode 6
No description available.
44 min
7. Episode 7
No description available.
44 min
8. Episode 8
No description available.
