I could spend all day going through everything on archive.org.
One of my favorite things is reading old newspapers. Google has a site with a bunch of newspaper archives for free.
https://news.google.com/newspapers
Occasionally relive my childhood reading Mad, Creepy & Eerie magazines:
https://archive.org/details/mad-magazine-collection_202106/Mad%20Comics%20001/
https://archive.org/details/creepy_warren
https://archive.org/details/eerie_magazines