Orbs are transparent balls of light that are most commonly caught on film.  Orbs seem to be found everywhere, because temperature and climate do not affect them. They are believed to be spirits in the the form of a ball of light. Spirits  are believed to travel in this form, because it takes less energy.  Some people can see them with the naked eye, but for the most part they are seen in photos.
~SPECIAL NOTE~
Rain drops, insects, and street lights have been mistaken most commonly for orbs.  Be sure to analyze your photos well to rule out any possiblity of these.
Now with that said....
Onto the pictures!!!!