Tokyo Metropolitan Area Outer Underground Discharge Channel

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This is one of the best things anyone interested in one of the most impressive engineering marvels ever can go and visit anywhere in the world. I cannot stress enough how good it is and how involved the tour gets (wearing waders to go waist deep in water to view the jet turbines used to pump water).<p>I strongly advise taking someone who can help translate Japanese with you as there&#x27;s a huge amount of information to take in and it&#x27;s a fantastic opportunity for anyone keen on photography as well.

Are there videos of it in action when it is being filled&#x2F;discharged?

Weren&#x27;t tours restricted some time ago?<p>You can go down, you can look at the place from one spot, bit you no longer can walk around.

Whoa, this place is insane! Feels like something outta a sci-fi flick.