Why are there random pictures appearing on my phone?

[Android Central Question]

Okay so I was going through my photos one day then noticed a picture of a monkey. It wasn't a actual picture it was just like a screenshot or something like that. So I didn't think anything of it and deleted it. So the next day after that I noticed there was another screenshot of a train on the remote weird I know but I never thought about checking the dates until today. Today I found a picture of a dark alley way with a few street lights in the back. Creepy yea!!! I checked the date and it says it was posted January 12th and at 833. I have a Samsung s6 if that helps

 

[Rukbat]

Were you on any site, with any app, that had those pictures? If you were, that app is missing a file that tells Android to not shoe pictures it downloads when you look at the pictures on your phone. (Every time you look at a website that has any graphics on it, those graphics get downloaded so you can see them.)