When you travel some where with a lot of history, pull journaling directly from Wikipedia.
Admittedly, Wikipedia isn’t all 100% correct but for things like castles, cities and other general history it is a great resource. Depending on where it is, I usually only need the general paragraph or 2 at the beginning of a Wikipedia page.
I like my travel albums to include all the info for someone reading through it to have everything they need to really feel like they were there. Such an easy journaling insert.