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Modern Marvels (1993 – ...)

1993 • 23 seasons • Documentary • TV-PG
On September 25, 2026
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Season 17

Modern Marvels · S17E7 — Secret Underground

Dec 10, 2010 · 44 min

Synopsis

Beneath the familiar landscape lies another America, largely unseen and unknown. Journey into this concealed world, exploring the secrets that lie just below the surface: clandestine military bases, pioneering agricultural research facilities, intricate tunnel systems, and cutting-edge technologies like neutron lasers.