So what did Yahoo's first page look like? (very plain vanilla, compared to now).
Or which fabrics were selling at the Fat Quarter Shop? (Moda Paris Flea Market, for one).
Or if, like me, your first email account was with Rocketmail and you want a frisson of memory as you revisit the Rocketmail home page? (Rocketmail was subsequently swallowed by Yahoo).
Try the Internet Archive. It doesn't have everything, but its Wayback Machine (ordinary and advanced search) can show you all of the above, and many more.