If you can read French, have a look at the possible explanations for these lost ballerina shoes. If you care to make your own guess as to why they were abandoned, comment here!
There’s a great article from Time Out about items that are lost and found on the tube. Worth a read if you haven’t seen it yet. Some of the most unusual finds listed include false teeth, a 14-foot boat, an urn of ashes, a grandfather clock, a jar of bull’s sperm, two human skulls in a bag and breast implants.