Random Pictures

I was browsing through my office computer's Picture Folder and was intrigued by all the variety of interesting pictures it contains. The pictures on my office computer are mostly related to work somehow -- pictures I've used for lessons and presentations. The context of most of these pictures I cannot remember; I can only remember the one of the dog, which I used during a lesson on public speaking, in a unit concerning active listening.

Unfortunately I don't know the sources of these pictures anymore. I share them in goodwill.