Bifrost Skydock

I was walking my dogs one evening and the idea hit me, "how about a race of spacefaring Vikings?" so I set to work...

The Bifrost Skydock sits atop the mountain which it is named after, tall enough to reach the outer layer of an extraplanetary Dustlane which clings to the mid-stratosphere. The Jotun constructed this gargantuan tower over the course of several centuries to serve as a dock for their skyships.