Megaprojects that work ... Faroe Islands
TL;DR: no railroad content. But I simply can't conceive of things like this being done most other places, *especially* in the US, and especially at the amazingly reasonable prices. Hint: if all of what they talked about in the show is added up, it barely reaches $1B; and CAHSR's IOS/test track is likely $20B or more? I know, reasons, but ...
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The whole "country" (self-governing dependency of Denmark, like Greenland), of course, has a population smaller than Kings County, and the biggest/capitol city is <15K.
Interesting side look at energy systems there, too.
Not sure if The B1M is produced for BBC or the like. Definitely has BBC-level production values.