Mysteries of the Abandoned

Discoveries reveal why an escape route built for Armageddon is abandoned.

New discoveries reveal why a mysterious American pyramid is abandoned.

Discoveries reveal why a Russian hole to hell in the Arctic is abandoned.

Discoveries reveal why a Russian military base in the desert is abandoned.

New discoveries reveal why a secret structure on a mountain is abandoned.

A ghost town in the Amazon and a secret Nazi base.

New discoveries reveal why a Soviet fortress by the sea is abandoned.