BDI, ETc...
An Intersection of various things in technology, news & entertainment, science and fiction, ETc.
Monday, September 02, 2019
The deepest US station: Washington Park, MAX LRT, Portland, OR
https://www.youtube.com/watch?v=3CIShZYLQEI
https://structurae.net/en/structures/tunnels-caverns-and-shafts
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