Here are 5 images from SpringerImages to give an idea of the breadth of coverage. Note that none of these are "scientific" – graphs, etc. All are copyrighted by Springer (in some form). I do not believe any of the original sources are Springer journals or books (i.e. they are third party material publisher with/out permission in Springer outlets.
HYPOTHESIS – none of the original creators are aware of and approve of Springer copyrighting the material and badging it with SpringerImages.
Katie in the ravine. © Groundwood Books, 2008
Iris falling from the sky. © Jim Zubkavich, 2006
The rescue of baby Jessica. Source: "The Baby Jessica Rescue Web Page," http://www.caver.net/j/jrescue.html . Accessed 24 November 2008
HYPOTHESIS: originally from http://www.ronsangels.com/