The Underwater Prison
- Episode aired Apr 2, 2019
- 1h
Concrete towers in Finland's snowy countryside, the remains of a tunnel leading deep into the Blue Ridge Mountains, an abandoned Soviet prison beneath the water, and a massive rust covered r... Read allConcrete towers in Finland's snowy countryside, the remains of a tunnel leading deep into the Blue Ridge Mountains, an abandoned Soviet prison beneath the water, and a massive rust covered relic standing on the coast of southern Spain. Who used and abandoned them ?Concrete towers in Finland's snowy countryside, the remains of a tunnel leading deep into the Blue Ridge Mountains, an abandoned Soviet prison beneath the water, and a massive rust covered relic standing on the coast of southern Spain. Who used and abandoned them ?