The first is from the show The Magnificent Century: Kösem and the second is from the film Percy Jackson and the Lightning Thief. You can always find out the fandom but clicking the hyperlinks in the post (e.g. where it says 'You can use any caps between 25th May - 22nd June to make your icons' here) and then navigate to next/previous posts at capspiration to find the images. I think eventually I will include the image fandoms in the challenge posts too but at the moment there are too many caps for me to do.