Do you like visiting museums? Here's a thing that I do when I travel, that you can do too.
Look up local public libraries and university libraries. Click around their website to find their "special collections". Contact the library & ask if you could spend some time in that collection. They will often give you a "finding aid" and ask you to tell them what stuff you'd like to handle. Do that instead of or in addition to visiting local museums. It's like a museum but you are the only person there