Hoover Dam spillway tunnel, 50 feet wide & 600 feet deep. You can hear rushing water down in the darkness. The walkway above gives a sense of scale.


Hoover Dam spillway tunnel, 50 feet wide & 600 feet deep. You can hear rushing water down in the darkness. The walkway above gives a sense of scale.



View Reddit by MonsterJuicedView Source

We will be happy to hear your thoughts

Leave a reply

Newsline.world
Logo