I gave it ansel adams photos which it did really well on. Then I tried some famous national geographic photos, like the these: https://www.nationalgeographic.com/photography/article/meet-...

still impressed

I decided to go really old, so I tried "Valley of the Shadow of Death" from the 1850s where we get some red and blue cannonballs, but that's fine.

1838 Louis Daguerre photo of paris: https://9ol.es/1838.png

1906 Kite aerial of san francisco after the earthquake: http://9ol.es/1906.png

1895 Montparnasse train wreck: http://9ol.es/1895.png

1920 Wall Street bombing: http://9ol.es/1920.png

1920s Park Row skyscrapers: http://9ol.es/parkrow.png