Mars Pathfinder Mission Home Page (1997)
That Page must have been really expensive. Fully responsive, seemingly tested on iPad and iPhone back when mobile browser penetration was much lower compared to now. Incredible loading times, maybe they used a lot of asset preprocessing/compressing to make the page load that fast.One thing that bothers me is that there is no Google Analytics. Without good tracking they might not be able to optimise conversion rates of the landing page in the long run.