The Internet Archive offers a tool whose entire purpose is to let you search gifs scraped from GeoCities. Here's a search for "under construction", eat your heart out: https://gifcities.org/?q=under+construction
There's a delightful irony in the fact that such a page would absolutely have murdered a browser from its era. Nevertheless, these remind me of a different internet and scratch one heck of a nostalgia zone.
That was a real hoot to scroll through. Thank you!
And then there's "PAUCI." (People Against Under Construction Images.) I guess their hard work, dedication, and commitment to the cause finally paid off.
https://www.andrews.edu/~rickyr/noconst.html