Many of the old school sprite web sites from the 90s and 2000s have vanished into obscurity, but thankfully there are some sprite websites still alive and well! Video game sprites and backgrounds can be useful for a variety of things such as sprite comics, fan games, or just to look at and appreciate the art that went into all these games!
https://www.spriters-resource.com/ One of the biggest sprite sites I know off, and they're always growing! Site may block your IP if you visit with a VPN active, so switch it off if you have any trouble.
https://spritedatabase.net/ Another nice sprite archive, a handy alternative if you don't want to turn off your VPN for spriters resource.
https://www.vgmaps.com/ A site specializing in maps from mostly old school and/or 2D games, all made from the games graphics!
