Get it into orbit and use it to tether (and as material for) a space elevator.
Now, space elevators are another topic. We don't have the materials right now but fun stuff like if one collapsed, it would wrap around the world a couple of times (IIRC).
Interestingly All the propositions I've seen are all tethered to a land base, I see no reason to not have it hanging with a landing pad as that would alleviate most of the issues they have been trying to work out.