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[narrator] As the water
courses down, it causes mudslides
that send boulders powering down the riverbeds. Seriously compromising
the stability of the mountaintop villages
courses down, it causes mudslides
that send boulders powering down the riverbeds. Seriously compromising
the stability of the mountaintop villages
Full Transcript
00:00:01.000 --> 00:00:03.000
[narrator] As the water
courses down,
00:00:03.000 --> 00:00:06.033
it causes mudslides
that send boulders
00:00:06.001 --> 00:00:07.833
powering down the riverbeds.
00:00:09.000 --> 00:00:11.005
Seriously compromising
the stability
00:00:11.005 --> 00:00:13.003
of the mountaintop villages.
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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.