[Dan_Sylveste]

> How would I find out what would be an appropriate kind of photograph to put on Wikipedia?

Anything that's relatively objective.

Pictures of structures, the more significant, the better. Bridges, for example. City halls, town halls, any 'grand' buildings in your town. Any buildings that seem unique or quirky.

Pictures that summarise a location: the average house, the average street, the average day.

https://www.shorpy.com/ has plenty of good examples of the type of 'documentarial' photos that would go over well.