The SHIELD Helicarrier is among the coolest craft in all of comics. The reveal of the vast airship in the very first Nick Fury Agent of SHIELD story always impresses. In this awesome image, Kirby does a masterful job with scale by having enormous airplanes and other craft switching impossibly close to the monster of the Helicarrer. Like Nick Fury the reader has been unaware of the location of the portentous meeting and we like him are gobsmacked.
The Helicarrier has been realized in the recent Marvel movies very effectively.They changed many aspects of the profile, but the idea of such a giant ship actually lifting off into the sky remains a grand spectacle.