This is kind of out there, but it could be awesome... Star Gates.
They would be a component. You could build them anywhere, in space or on a planet. They would provide instantaneous travel between itself and another star gate of the same size. Once two gates are linked they cannot be unlinked. If one gets destroyed the other one explodes as well.(Because they're linked... duh)
They would come in sizes small, large, extra large and Big Gulp.
No fuel is required for the object passing...
Star Gates
They would be a component. You could build them anywhere, in space or on a planet. They would provide instantaneous travel between itself and another star gate of the same size. Once two gates are linked they cannot be unlinked. If one gets destroyed the other one explodes as well.(Because they're linked... duh)
They would come in sizes small, large, extra large and Big Gulp.
No fuel is required for the object passing...
Star Gates