Individual Geocities pages are not valuable landmarks, but Geocities as a whole - the aesthetic, the community, the history - is definitely something to preserve. And the cost of saving all of Geocities is a tiny fraction of any physical monument.

What about the right to be forgotten? I certainly wouldn't want some random geocities page I made as a pre-teen, quite possibly with personal information on it, preserved and accessible for all eternity. Times were oh so much more innocent back then, putting mailing addresses and phone numbers on personal sites wasn't uncommon.

Jumping from one argument to another doesn't make for a good discussion. Either defend your initial argument, or start a different argument on the same level as the first.

That has nothing to do with it. The right to be forgotten is not mutually exclusive with public funding for the preservation of culturally valuable records. No one is saying you couldn't ask to have a specific datum removed, edited, or obscured to the public to protect your personal information.