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They needed to use dynamite
to blast this huge tunnel through 160-feet
mainly of limestone
to blast this huge tunnel through 160-feet
mainly of limestone
Full Transcript
00:00:01.000 --> 00:00:04.767
They needed to use dynamite
to blast this huge tunnel
00:00:04.767 --> 00:00:05.221
through 160-feet
mainly of limestone.
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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.