Megaproject. It’s a cool word. It’s an even cooler list-of-pages on Wikipedia. I’ve only worked on projects limited to tens or dozens of people. The human and geographical scale of some of these endeavors just blows my mind. The coordination and planning required for something like the Boeing 747 or Apollo program is beyond my comprehension. (OK, maybe I’m still really into aerospace; I did go to Space Camp. Twice.)
I would love to be a fly on the wall of the meeting where it’s decided to go ahead with a project that will be visible from quite some height above the earth like Denver International Airport or Walt Disney World. That’s a pretty huge commitment. I waffle for weeks when I decide I’m going to buy a new car!
If those don’t whet your appetite, perhaps speculative megastructures are more your speed? Trans-global highways! And of course, Dyson spheres, ringworlds, et cetera.
It’s good to remind myself that occasionally, human kind is capable of building really great stuff.