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A mile and a half literally if you walked
on every chamber, every tunnel
on every chamber, every tunnel
Full Transcript
00:00:01.000 --> 00:00:02.002
A mile and a half literally
00:00:02.002 --> 00:00:03.833
if you walked
on every chamber,
00:00:04.399 --> 00:00:05.599
every tunnel.
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Movie Summary
The world's most incredible engineering projects are revisited to uncover why places full of mysteries and untold secrets are now abandoned ruins.